TextArray vs Diffchecker
Updated July 22, 2026
Diffchecker is the best-known name in online comparison — paste two blocks of text, or upload files, PDFs, Word documents, spreadsheets and images, and it highlights every change line by line. For serious diffing it is excellent, and its paid Desktop app runs fully offline so confidential files never leave your machine.
TextArray is not a dedicated diff service; it includes a fast text-diff tool as one of 590+ utilities, all free, ad-free and running entirely in your browser. If comparing is the whole job, Diffchecker goes deeper. If it is one step among many, TextArray keeps it in the same place as everything else.
Where Diffchecker is strong
- Purpose-built diffing for text, code, PDFs, Word, Excel and images.
- Saveable, shareable diffs with line-by-line comments.
- A paid Desktop app that compares fully offline for sensitive documents.
The free Diffchecker website shows ads and, for its richer features, sends your content to its servers; the offline, ad-free experience is the paid Desktop and Pro tier. TextArray’s text-diff is free, carries no ads and never uploads anything — the comparison runs locally like every other tool on the site.
What TextArray adds is everything around the diff: sort the lines first, strip duplicates, normalise case, find and replace, then compare — without leaving for another tab. The ⌘K palette reaches all of it, in 18 languages. For deep file, PDF or image comparison, Diffchecker remains the stronger, more specialised choice.