Diff Checker
Compare two texts side-by-side and see the differences highlighted.
Need API access to Diff Checker?
Integrate this tool into your workflow with our REST API. 3 free requests/day, unlimited with Pro.
What is Diff Checker?
Paste two texts and instantly see a side-by-side comparison with additions, deletions, and modifications highlighted. Perfect for comparing code, config files, or any text. Supports line-by-line and word-by-word diff modes. All processing happens client-side.
AllKit's Diff Checker is completely free with no signup required. All processing happens directly in your browser — your data is never sent to any server, making it safe for sensitive information.
Why use AllKit?
- No ads, no distractions — a clean interface that lets you focus on the task
- Privacy-first — 100% client-side processing, nothing is uploaded
- Free forever — core tools are free with no usage limits
- API available — integrate into your workflow via our REST API
Frequently Asked Questions
What is a diff?▾
A diff shows the differences between two pieces of text. Lines that were added appear in green, removed lines in red, and unchanged lines stay neutral. It's the same concept used in Git version control.
Can I compare code files?▾
Yes. The diff checker works with any plain text — code, config files, prose, CSV data, or any text format. It supports both line-by-line and word-by-word comparison modes.
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