I am looking for a program that can spell-check a PDF document (without having to convert the PDF into another format like .docx, which I can do using Adobe Acrobate Pro). If possible, free, compatible with Windows 7 (otherwise Linux) and also checks for the grammar.

  • 1
    Do you expect this software to change the misspelled words after it finds them? Or just notify you? Also, are you trying to spell check a form or just a whole PDF in general?
    – aman207
    Jun 26 '14 at 2:11
  • @aman207 just notify me (if possible with option to correct the mistake). Whole PDF, not just form. Jun 26 '14 at 2:21

For a free, cross platform, application you can use LibreOffice Writer - it will open pdf documents read and write them, (other than password protected documents that you don't have the password and documents from some scanners which are actually image collections), you can spell & grammar check in a wide range of languages.

  • Free
  • Read & Write pdf files
  • Spell Check - 70 or 80 languages supported
  • Grammar Check
  • Language Tool Extension - can check for mixing up there/their, no/now, etc.
  • Windows/Linux/Mac OSX
  • Part of a full free, cross platform, office suite.

Screenshot of checking a pdf a fiend was sent: enter image description here

  • When I try to open a pdf with LibreOffice Writer, it opens in Draw instead. The words overlap, so the text is hard to read. The pdf was generated with Texmaker 5.0.3 on Ubuntu 18.04.2. Bad spelling gets underlined in red, so this hack works to some extent. Jun 4 '19 at 18:33

For a paid option, you can try an Adobe Acrobat script called Spell Check Suite for $85. They do have a free demo here which allows you to check the first page of a document.

This suite of tools adds full spell-checking capabilities to Acrobat. You can now check and mark up regular text and bookmarks in addition to the standard check for form fields and comments which already exists in Acrobat.


  • Compatible with Adobe Acrobat (free or paid) on any platform
  • Spell check 33 languages
    • You can select which language you wish to spell check prior to checking the document
  • Spell check either the whole document or just a selection
  • I am unsure if it changes the incorrect words as I have not used this software myself, but it does notify you of the misspelled words and suggestions for the correct spelling. Much like spell checker on word.
  • Add/remove words from dictionaries (different dictionaries for each language)
  • Unfortunately, no grammar checking


Spell check menu

Spell check menu

Language select

Language select

Highlighted words that are misspelled

Highlighted, misspelled words

Spell check zones

Spell check zones

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