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Free Text Tool
Text Compare: Free Online Diff Checker for Text & Code
Compare two versions of any text, document or code and see exactly what changed. Additions, deletions and edits are highlighted line by line and word by word, side by side or in a unified view. Merge changes with one click, export a patch, and keep your text private: everything runs in your browser.
Text Compare
Find every difference between two texts: added, removed and changed lines, words and characters.
Tip: Ctrl + Enter compares. N / P jump between changes.
Ignore custom text (dates, IDs, version numbers…)
Matching text is removed from each line before comparing, so lines that differ only in that text count as unchanged.
Your texts are compared in your browser and never uploaded. Share links keep the texts inside the link itself.
Views: Side by Side & Unified
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Runs in Your Browser
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How It Works
How to Compare Two Texts
Find every difference in four simple steps.
Add Both Texts
Paste the original and the changed text, open files from your computer or drop them onto the boxes.
Choose What Matters
Pick word or character highlighting and ignore case, whitespace, blank lines or text such as dates and IDs.
Review the Differences
Removed text is red, added text is green. Jump between changes with the arrows or the N and P keys.
Merge, Export or Share
Copy individual changes across with the merge arrows, download a .diff patch or HTML report, or share a link.
Why It Is Different
Compare Text Precisely Privately
Many free diff checkers send your text to their servers or keep their best features behind a paywall. This tool runs entirely in your browser and uses the same minimal-difference algorithm as diff and Git, with word-level highlighting, merging and patch export included for free.
1/ Accurate Line Matching
Uses the Myers diff algorithm to find the smallest set of added and removed lines, the same approach as GNU diff and Git.
2/ Smart Ignore Options
Ignore case, trailing or all whitespace, blank lines, or custom text and regular expressions such as timestamps.
3/ Merge, Patch & Report
Copy changes between versions with undo, export a standard unified diff that works with patch and Git, or save an HTML report.
Use Cases
Who Uses a Text Compare Tool?
Anyone who works with more than one version of a text.
Writers & Editors
Spot every edit between drafts, check proofreading changes and confirm nothing was lost.
Developers
Compare code, configuration and log files, then export a patch you can apply with git apply or patch.
Contracts & Policies
See exactly which words changed between two versions of an agreement or policy.
SEO Content Updates
Check page copy, titles and meta descriptions before and after an update. Preview snippets with our SERP tool.
Custom Tools & Automation
Need document comparison built into your own workflow or app? Our development team can help.
It splits both texts into lines and finds the smallest set of lines that were added or removed, using the Myers diff algorithm also used by GNU diff and Git. Changed lines are then compared word by word or character by character to highlight exactly what changed.
No. The comparison runs entirely in your browser and nothing is sent to our servers. Share links keep both texts inside the link itself, after the # sign, which browsers never send to a server.
They let you hide differences you do not care about: upper and lower case, whitespace at the end of lines or anywhere, blank lines, or any custom text or regular expression such as dates and build numbers. Ignored differences are treated as unchanged.
Yes. In the side-by-side view each change has arrows that copy it from one text to the other. Every merge can be undone.
A unified diff (.diff or .patch file) is the standard format for describing changes between files. You can apply the downloaded file with patch or git apply to turn the original text into the changed one.
Each text can be up to 10 MB. Live comparison updates as you type for texts up to 500,000 characters in total; for larger texts, click Compare. Extremely large texts that are almost completely different may show some sections as fully replaced.
Need a Custom Tool for Your Team?
iRankFlow builds custom web tools, automations and data pipelines, from document comparison to content monitoring.
- Custom web and app development
- Workflow automation and integrations
- Free initial consultation