Compare two text files online — free, no account
To compare two text files, drop them into Diffesq: side-by-side and unified views show every changed line, free and unlimited, with no account and no upload. Markdown gets the same treatment.
How it works
- Drop a text or Markdown file on each side of the workbench.
- The diff computes instantly on your device.
- Switch between side-by-side and unified views; step through changes with Prev/Next.
- Export a report if you need one — free users get a watermarked sample, Pro exports are clean.
What the comparison covers
- Line-level comparison with intraline change highlighting.
- Side-by-side and unified views with synchronized navigation.
- Free and unlimited for text and Markdown — full results, not a preview.
Free vs Pro
Text and Markdown comparison is free, unlimited, and complete. Pro adds full structured-file comparisons (Word, Excel, JSON, YAML, XML, CSV, folders, images) and unwatermarked exports.
See Pricing for plans — $2.97/month, $27.99/year, or $49 once.
Privacy
Every comparison runs locally in your browser. Your files are never uploaded — there is no server that receives them, and the page keeps working with Wi-Fi turned off. Details in the Privacy Policy.
Frequently asked questions
Is the free tier actually unlimited?
Yes — for text and Markdown, every comparison runs free and in full, with no account, no file count limit, and no trial clock.
Why use this instead of pasting into an online diff site?
Pasting sends your text to someone's server. Diffesq computes the diff in your browser, so the content never leaves your machine.
Does it work offline?
Yes — once the page has loaded, parsing, comparing, and rendering all happen on your device. Turn off Wi-Fi and it still works.