Diffchecker alternative for private text & code
CheckDiffs is a lightweight, private side-by-side diff. Diffchecker is a broader product with more formats and Pro tooling. Choose based on privacy and scope — not hype. We built CheckDiffs for the clipboard moment after ChatGPT, Claude, Cursor, Lovable, or Bolt rewrites a file and you still need a clear before/after.
Comparison below reflects typical public free/Pro positioning and may change. We do not claim parity on every format Diffchecker supports.
| Feature | CheckDiffs | Diffchecker |
|---|---|---|
| Where text is processed | In your browser — nothing uploaded for basic compare | Server-side for many flows / accounts |
| Side-by-side text & code | Free forever (basic) | Free tier + Pro for extras |
| Ads on the tool | No ads today | Free tier may show ads / upgrade prompts |
| File formats | Text & code (paste-first) | More formats (PDF, images, etc.) via Pro |
| Interactive editor | Monaco Diff Editor — jump + merge | Broader product; different editor focus |
| Share links / history | Pro idea (TBD) | Available (esp. Pro) |
| Account required | No for basic compare | Optional; needed for some features |
When CheckDiffs is the better fit
You care that the paste never leaves the browser for basic compare. You want an interactive Monaco editor with jump and merge — not a static highlight. Your input is text or code, not a scanned PDF. You do not want an account wall between you and the diff. Background: About.
When a broader suite wins
You need PDF or image compare, shareable history links today, or a multi-format document workflow. That is a different product shape — and saying so is more useful than pretending we cover everything. Reviewing an AI rewrite specifically? AI code diff.
FAQ
Should I switch from Diffchecker?
Only if your needs match ours: paste-first text/code, client-side privacy, Monaco jump/merge. If you rely on PDF/image compare or share history today, stay on a broader suite — or use both for different jobs.
Is CheckDiffs really private?
Basic side-by-side runs in the browser; we do not upload your paste for that flow. Verify in DevTools → Network. Full details on Privacy.
About · Privacy · AI code diff