Compare two text blocks line by line with a unified diff view. Additions highlighted in green, deletions in red, unchanged context visible for orientation.
Open Text Diff Checker → free, no sign-inComparing two versions of a text — a contract before and after edits, a configuration file before and after a change, two versions of a document — requires a diff view. The Text Diff Checker shows a line-by-line unified diff: additions in green, deletions in red, unchanged context lines visible for orientation. Clear, precise, immediately useful.
Developers comparing code or config changes, editors tracking document revisions, legal professionals reviewing contract edits, anyone who needs to understand exactly what changed between two versions of a text.
No tutorials. No learning curve. Open it and get started.
No server uploads. Unified diff format with context lines — additions and deletions are shown in their surrounding context for easy orientation.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. Text Diff Checker was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
What is a unified diff?
A format showing additions (+) and deletions (-) with surrounding context lines to orient you within the document.
Can I compare code?
Yes — works for any plain text including code, configuration, and prose.
Is it case sensitive?
Yes by default — toggle case-insensitive comparison if needed.
Can I compare PDFs or Word documents?
Extract text first using the appropriate tool, then compare the plain text.
Is there a length limit?
No — runs locally, limited only by browser memory.
Free. Instant. No sign-in. Open it and get the job done.
Open Text Diff Checker on Doathingy.com →