Text File Comparison

Compare two files line by line with context.

Private by design· Processed locally · Originals unchanged

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Choose two text files to compare by line number. Insertions shift later lines; no semantic matching.

UTF-8 · TXT, CSV or JSON · 10 MB total · 100,000 lines

Privacy, limitations & disclaimers

Select exactly two UTF-8 text files. Report compares line positions (insertions shift later lines); no semantic alignment. Up to 10 MB total and 100,000 lines.

Your selected files are processed in your browser. They are not uploaded to FilesStayLocal servers for processing. Your original files are not overwritten; processed results are provided as separate downloads.

Review downloaded results before relying on them. Processing may change formatting, image quality, metadata or other file characteristics. Keep your original files as a backup. Browser memory and supported-format limitations apply.

Reset clears temporary interface state and releases eligible preview URLs. It does not securely erase browser or device storage.

Select files to see a local Before → After preview. Downloads become available only after Process locally.