How to find out why is text not searchable in a PDF (and make it searchable)











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2
down vote

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I have a PDF article (not created by me).
However, I can not search for text in the PDF. All PDF viewers I've tried return zero results for words that are obviously in there. I've tried with Adobe Acrobat Professional 8, SumatraPDF and Google Chrome.



How can I find out why the document is not searchable?



Things I've checked:




  • The PDFproducer is reported as 'pdftopdf' and PDf version is reported as 1.3. However, it seems to have been created in something like MSWord or OpenOffice (but not *TEX).

  • It is definitely not a scanned document, as the font is crisp-clear at all zoom levels, and text is selectable.

  • If I look at the security settings (ctrl-D in Adobe Acrobat), everything is allowed (like printing, copying, ...).

  • my search options do not have 'match case' turned on

  • I can not turn it into a searchable document using Acrobat's 'Recognize text using OCR' as it reports: 'This page contains renderable text'.


So, what else could be the reason for the DPF not being searchable?
And how to make it text-searchable?










share|improve this question
























  • Interesting, is that document contains any sensitive data? if not can you share it?
    – SparKot
    Mar 6 '13 at 9:49










  • @SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
    – Rabarberski
    Mar 6 '13 at 10:02










  • Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
    – ChaosCakeCoder
    Mar 6 '13 at 10:17















up vote
2
down vote

favorite












I have a PDF article (not created by me).
However, I can not search for text in the PDF. All PDF viewers I've tried return zero results for words that are obviously in there. I've tried with Adobe Acrobat Professional 8, SumatraPDF and Google Chrome.



How can I find out why the document is not searchable?



Things I've checked:




  • The PDFproducer is reported as 'pdftopdf' and PDf version is reported as 1.3. However, it seems to have been created in something like MSWord or OpenOffice (but not *TEX).

  • It is definitely not a scanned document, as the font is crisp-clear at all zoom levels, and text is selectable.

  • If I look at the security settings (ctrl-D in Adobe Acrobat), everything is allowed (like printing, copying, ...).

  • my search options do not have 'match case' turned on

  • I can not turn it into a searchable document using Acrobat's 'Recognize text using OCR' as it reports: 'This page contains renderable text'.


So, what else could be the reason for the DPF not being searchable?
And how to make it text-searchable?










share|improve this question
























  • Interesting, is that document contains any sensitive data? if not can you share it?
    – SparKot
    Mar 6 '13 at 9:49










  • @SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
    – Rabarberski
    Mar 6 '13 at 10:02










  • Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
    – ChaosCakeCoder
    Mar 6 '13 at 10:17













up vote
2
down vote

favorite









up vote
2
down vote

favorite











I have a PDF article (not created by me).
However, I can not search for text in the PDF. All PDF viewers I've tried return zero results for words that are obviously in there. I've tried with Adobe Acrobat Professional 8, SumatraPDF and Google Chrome.



How can I find out why the document is not searchable?



Things I've checked:




  • The PDFproducer is reported as 'pdftopdf' and PDf version is reported as 1.3. However, it seems to have been created in something like MSWord or OpenOffice (but not *TEX).

  • It is definitely not a scanned document, as the font is crisp-clear at all zoom levels, and text is selectable.

  • If I look at the security settings (ctrl-D in Adobe Acrobat), everything is allowed (like printing, copying, ...).

  • my search options do not have 'match case' turned on

  • I can not turn it into a searchable document using Acrobat's 'Recognize text using OCR' as it reports: 'This page contains renderable text'.


So, what else could be the reason for the DPF not being searchable?
And how to make it text-searchable?










share|improve this question















I have a PDF article (not created by me).
However, I can not search for text in the PDF. All PDF viewers I've tried return zero results for words that are obviously in there. I've tried with Adobe Acrobat Professional 8, SumatraPDF and Google Chrome.



How can I find out why the document is not searchable?



Things I've checked:




  • The PDFproducer is reported as 'pdftopdf' and PDf version is reported as 1.3. However, it seems to have been created in something like MSWord or OpenOffice (but not *TEX).

  • It is definitely not a scanned document, as the font is crisp-clear at all zoom levels, and text is selectable.

  • If I look at the security settings (ctrl-D in Adobe Acrobat), everything is allowed (like printing, copying, ...).

  • my search options do not have 'match case' turned on

  • I can not turn it into a searchable document using Acrobat's 'Recognize text using OCR' as it reports: 'This page contains renderable text'.


So, what else could be the reason for the DPF not being searchable?
And how to make it text-searchable?







pdf search






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 6 '13 at 10:33

























asked Mar 6 '13 at 9:45









Rabarberski

4,442216078




4,442216078












  • Interesting, is that document contains any sensitive data? if not can you share it?
    – SparKot
    Mar 6 '13 at 9:49










  • @SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
    – Rabarberski
    Mar 6 '13 at 10:02










  • Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
    – ChaosCakeCoder
    Mar 6 '13 at 10:17


















  • Interesting, is that document contains any sensitive data? if not can you share it?
    – SparKot
    Mar 6 '13 at 9:49










  • @SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
    – Rabarberski
    Mar 6 '13 at 10:02










  • Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
    – ChaosCakeCoder
    Mar 6 '13 at 10:17
















Interesting, is that document contains any sensitive data? if not can you share it?
– SparKot
Mar 6 '13 at 9:49




Interesting, is that document contains any sensitive data? if not can you share it?
– SparKot
Mar 6 '13 at 9:49












@SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
– Rabarberski
Mar 6 '13 at 10:02




@SparKot: I am not sure if I can share the document, so I prefer rather not to. Although I understand this would greatly aid in troubleshooting.
– Rabarberski
Mar 6 '13 at 10:02












Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
– ChaosCakeCoder
Mar 6 '13 at 10:17




Have you tried to upload it to Evernote and check if they can make it searchable? AFAIK they have a good OCR engine for that task.
– ChaosCakeCoder
Mar 6 '13 at 10:17










5 Answers
5






active

oldest

votes

















up vote
6
down vote



accepted











  • It may have a custom font encoding that assigns code points to characters in a way that is incompatible with established encodings such as ASCII or UTF-8/Unicode.


  • It may render characters individually out of sequence


  • It may have had characters flattened to paths



See https://stackoverflow.com/questions/12703387/pdf-font-encoding.

and https://stackoverflow.com/questions/4523283/how-do-you-debug-pdf-files



To make it text searchable, the best way may be to go back to the original source (e.g. a Word document) and use a different process to produce the PDF. Alternatively you could try rendering your current PDF as a bitmap and then using OCR, but this will be tedious and produce poor results.






share|improve this answer























  • Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
    – Rabarberski
    Mar 6 '13 at 10:30




















up vote
1
down vote













I found a way around this problem. I did tools -> edit document text, then for each page, I hit Control-A (select all), then right-clicked and went to properties, and changed the font to something else. After I did this, the text was searchable and I could copy the text!






share|improve this answer





















  • I think the edit document text option is only available in the paid version of Acrobat.
    – Burgi
    May 1 '16 at 18:57










  • Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
    – Don
    May 4 '16 at 3:03


















up vote
0
down vote













I was having the same problem, and in frustration, googled to find an answer. It turns out that for me, the problem was simply that I was using Preview on my iMac to view and search the PDF. In most cases, searching works in Preview. But for a large book downloaded from Google Books, it didn't.



What worked was simply opening the PDF in Adobe Reader. (Duh, what a concept, I know.) Now I can search. This probably won't work for everyone with a Mac, but it might help someone.






share|improve this answer





















  • "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
    – NetwOrchestration
    Jan 2 '17 at 19:43










  • Please read the question again carefully. Your answer does not answer the original question.
    – DavidPostill
    Jan 29 '17 at 15:47


















up vote
0
down vote













go to Edit / preferences - select 'search' from the left hand side of preferences screen - then 'Purge Cache Contents' - select OK then close and reopen the document






share|improve this answer




























    up vote
    0
    down vote













    So after trying a lot of things that didn't work. Here's how I actually got this done:




    1. Find yourself a PDF to Word converter or something. (I recommend https://www.online-convert.com/ )


    2. Follow al the necessary steps to convert BUT before that--


    3. Find the button that says something like 'optical character recognition' and click that


    4. Convert your file and you should be golden.







    share|improve this answer





















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      5 Answers
      5






      active

      oldest

      votes








      5 Answers
      5






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes








      up vote
      6
      down vote



      accepted











      • It may have a custom font encoding that assigns code points to characters in a way that is incompatible with established encodings such as ASCII or UTF-8/Unicode.


      • It may render characters individually out of sequence


      • It may have had characters flattened to paths



      See https://stackoverflow.com/questions/12703387/pdf-font-encoding.

      and https://stackoverflow.com/questions/4523283/how-do-you-debug-pdf-files



      To make it text searchable, the best way may be to go back to the original source (e.g. a Word document) and use a different process to produce the PDF. Alternatively you could try rendering your current PDF as a bitmap and then using OCR, but this will be tedious and produce poor results.






      share|improve this answer























      • Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
        – Rabarberski
        Mar 6 '13 at 10:30

















      up vote
      6
      down vote



      accepted











      • It may have a custom font encoding that assigns code points to characters in a way that is incompatible with established encodings such as ASCII or UTF-8/Unicode.


      • It may render characters individually out of sequence


      • It may have had characters flattened to paths



      See https://stackoverflow.com/questions/12703387/pdf-font-encoding.

      and https://stackoverflow.com/questions/4523283/how-do-you-debug-pdf-files



      To make it text searchable, the best way may be to go back to the original source (e.g. a Word document) and use a different process to produce the PDF. Alternatively you could try rendering your current PDF as a bitmap and then using OCR, but this will be tedious and produce poor results.






      share|improve this answer























      • Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
        – Rabarberski
        Mar 6 '13 at 10:30















      up vote
      6
      down vote



      accepted







      up vote
      6
      down vote



      accepted







      • It may have a custom font encoding that assigns code points to characters in a way that is incompatible with established encodings such as ASCII or UTF-8/Unicode.


      • It may render characters individually out of sequence


      • It may have had characters flattened to paths



      See https://stackoverflow.com/questions/12703387/pdf-font-encoding.

      and https://stackoverflow.com/questions/4523283/how-do-you-debug-pdf-files



      To make it text searchable, the best way may be to go back to the original source (e.g. a Word document) and use a different process to produce the PDF. Alternatively you could try rendering your current PDF as a bitmap and then using OCR, but this will be tedious and produce poor results.






      share|improve this answer















      • It may have a custom font encoding that assigns code points to characters in a way that is incompatible with established encodings such as ASCII or UTF-8/Unicode.


      • It may render characters individually out of sequence


      • It may have had characters flattened to paths



      See https://stackoverflow.com/questions/12703387/pdf-font-encoding.

      and https://stackoverflow.com/questions/4523283/how-do-you-debug-pdf-files



      To make it text searchable, the best way may be to go back to the original source (e.g. a Word document) and use a different process to produce the PDF. Alternatively you could try rendering your current PDF as a bitmap and then using OCR, but this will be tedious and produce poor results.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited May 23 '17 at 12:41









      Community

      1




      1










      answered Mar 6 '13 at 10:24









      RedGrittyBrick

      66.3k12104159




      66.3k12104159












      • Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
        – Rabarberski
        Mar 6 '13 at 10:30




















      • Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
        – Rabarberski
        Mar 6 '13 at 10:30


















      Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
      – Rabarberski
      Mar 6 '13 at 10:30






      Ah, the encoding seems indeed to be the issue. When I try to copy paste text, I get garbage. And the Font tab in Acrobat says for each listed font 'encoding: custom'
      – Rabarberski
      Mar 6 '13 at 10:30














      up vote
      1
      down vote













      I found a way around this problem. I did tools -> edit document text, then for each page, I hit Control-A (select all), then right-clicked and went to properties, and changed the font to something else. After I did this, the text was searchable and I could copy the text!






      share|improve this answer





















      • I think the edit document text option is only available in the paid version of Acrobat.
        – Burgi
        May 1 '16 at 18:57










      • Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
        – Don
        May 4 '16 at 3:03















      up vote
      1
      down vote













      I found a way around this problem. I did tools -> edit document text, then for each page, I hit Control-A (select all), then right-clicked and went to properties, and changed the font to something else. After I did this, the text was searchable and I could copy the text!






      share|improve this answer





















      • I think the edit document text option is only available in the paid version of Acrobat.
        – Burgi
        May 1 '16 at 18:57










      • Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
        – Don
        May 4 '16 at 3:03













      up vote
      1
      down vote










      up vote
      1
      down vote









      I found a way around this problem. I did tools -> edit document text, then for each page, I hit Control-A (select all), then right-clicked and went to properties, and changed the font to something else. After I did this, the text was searchable and I could copy the text!






      share|improve this answer












      I found a way around this problem. I did tools -> edit document text, then for each page, I hit Control-A (select all), then right-clicked and went to properties, and changed the font to something else. After I did this, the text was searchable and I could copy the text!







      share|improve this answer












      share|improve this answer



      share|improve this answer










      answered Apr 29 '16 at 7:27









      Don

      111




      111












      • I think the edit document text option is only available in the paid version of Acrobat.
        – Burgi
        May 1 '16 at 18:57










      • Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
        – Don
        May 4 '16 at 3:03


















      • I think the edit document text option is only available in the paid version of Acrobat.
        – Burgi
        May 1 '16 at 18:57










      • Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
        – Don
        May 4 '16 at 3:03
















      I think the edit document text option is only available in the paid version of Acrobat.
      – Burgi
      May 1 '16 at 18:57




      I think the edit document text option is only available in the paid version of Acrobat.
      – Burgi
      May 1 '16 at 18:57












      Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
      – Don
      May 4 '16 at 3:03




      Probably - the original poster has Acrobat Professional 8. That should have it. This approach (changing the font) may work with other tools.
      – Don
      May 4 '16 at 3:03










      up vote
      0
      down vote













      I was having the same problem, and in frustration, googled to find an answer. It turns out that for me, the problem was simply that I was using Preview on my iMac to view and search the PDF. In most cases, searching works in Preview. But for a large book downloaded from Google Books, it didn't.



      What worked was simply opening the PDF in Adobe Reader. (Duh, what a concept, I know.) Now I can search. This probably won't work for everyone with a Mac, but it might help someone.






      share|improve this answer





















      • "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
        – NetwOrchestration
        Jan 2 '17 at 19:43










      • Please read the question again carefully. Your answer does not answer the original question.
        – DavidPostill
        Jan 29 '17 at 15:47















      up vote
      0
      down vote













      I was having the same problem, and in frustration, googled to find an answer. It turns out that for me, the problem was simply that I was using Preview on my iMac to view and search the PDF. In most cases, searching works in Preview. But for a large book downloaded from Google Books, it didn't.



      What worked was simply opening the PDF in Adobe Reader. (Duh, what a concept, I know.) Now I can search. This probably won't work for everyone with a Mac, but it might help someone.






      share|improve this answer





















      • "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
        – NetwOrchestration
        Jan 2 '17 at 19:43










      • Please read the question again carefully. Your answer does not answer the original question.
        – DavidPostill
        Jan 29 '17 at 15:47













      up vote
      0
      down vote










      up vote
      0
      down vote









      I was having the same problem, and in frustration, googled to find an answer. It turns out that for me, the problem was simply that I was using Preview on my iMac to view and search the PDF. In most cases, searching works in Preview. But for a large book downloaded from Google Books, it didn't.



      What worked was simply opening the PDF in Adobe Reader. (Duh, what a concept, I know.) Now I can search. This probably won't work for everyone with a Mac, but it might help someone.






      share|improve this answer












      I was having the same problem, and in frustration, googled to find an answer. It turns out that for me, the problem was simply that I was using Preview on my iMac to view and search the PDF. In most cases, searching works in Preview. But for a large book downloaded from Google Books, it didn't.



      What worked was simply opening the PDF in Adobe Reader. (Duh, what a concept, I know.) Now I can search. This probably won't work for everyone with a Mac, but it might help someone.







      share|improve this answer












      share|improve this answer



      share|improve this answer










      answered Jan 2 '17 at 19:18









      Susan

      1




      1












      • "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
        – NetwOrchestration
        Jan 2 '17 at 19:43










      • Please read the question again carefully. Your answer does not answer the original question.
        – DavidPostill
        Jan 29 '17 at 15:47


















      • "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
        – NetwOrchestration
        Jan 2 '17 at 19:43










      • Please read the question again carefully. Your answer does not answer the original question.
        – DavidPostill
        Jan 29 '17 at 15:47
















      "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
      – NetwOrchestration
      Jan 2 '17 at 19:43




      "I've tried with Adobe Acrobat Professional 8" OP said. Please read the question carefully.
      – NetwOrchestration
      Jan 2 '17 at 19:43












      Please read the question again carefully. Your answer does not answer the original question.
      – DavidPostill
      Jan 29 '17 at 15:47




      Please read the question again carefully. Your answer does not answer the original question.
      – DavidPostill
      Jan 29 '17 at 15:47










      up vote
      0
      down vote













      go to Edit / preferences - select 'search' from the left hand side of preferences screen - then 'Purge Cache Contents' - select OK then close and reopen the document






      share|improve this answer

























        up vote
        0
        down vote













        go to Edit / preferences - select 'search' from the left hand side of preferences screen - then 'Purge Cache Contents' - select OK then close and reopen the document






        share|improve this answer























          up vote
          0
          down vote










          up vote
          0
          down vote









          go to Edit / preferences - select 'search' from the left hand side of preferences screen - then 'Purge Cache Contents' - select OK then close and reopen the document






          share|improve this answer












          go to Edit / preferences - select 'search' from the left hand side of preferences screen - then 'Purge Cache Contents' - select OK then close and reopen the document







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jun 1 '17 at 22:09









          hope this helps

          1




          1






















              up vote
              0
              down vote













              So after trying a lot of things that didn't work. Here's how I actually got this done:




              1. Find yourself a PDF to Word converter or something. (I recommend https://www.online-convert.com/ )


              2. Follow al the necessary steps to convert BUT before that--


              3. Find the button that says something like 'optical character recognition' and click that


              4. Convert your file and you should be golden.







              share|improve this answer

























                up vote
                0
                down vote













                So after trying a lot of things that didn't work. Here's how I actually got this done:




                1. Find yourself a PDF to Word converter or something. (I recommend https://www.online-convert.com/ )


                2. Follow al the necessary steps to convert BUT before that--


                3. Find the button that says something like 'optical character recognition' and click that


                4. Convert your file and you should be golden.







                share|improve this answer























                  up vote
                  0
                  down vote










                  up vote
                  0
                  down vote









                  So after trying a lot of things that didn't work. Here's how I actually got this done:




                  1. Find yourself a PDF to Word converter or something. (I recommend https://www.online-convert.com/ )


                  2. Follow al the necessary steps to convert BUT before that--


                  3. Find the button that says something like 'optical character recognition' and click that


                  4. Convert your file and you should be golden.







                  share|improve this answer












                  So after trying a lot of things that didn't work. Here's how I actually got this done:




                  1. Find yourself a PDF to Word converter or something. (I recommend https://www.online-convert.com/ )


                  2. Follow al the necessary steps to convert BUT before that--


                  3. Find the button that says something like 'optical character recognition' and click that


                  4. Convert your file and you should be golden.








                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Jun 1 at 20:39









                  Alex

                  1




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