Free Online Diff and Comparison Tools
Paste both versions and read the additions and deletions side by side.
3 tools in this section
Compare Two Text Files Online
Compare two text files online and find the differences line by line. Free side-by-side text comparison tool, no signup.
Compare Code Side by Side Online
Compare two versions of code side by side with syntax highlighting. Free online code diff tool for spotting changes fast.
Compare Two JSON Files Online
Compare two JSON files online and find the differences instantly. Free JSON diff checker with syntax highlighting, no upload.
Full Tool Pages
About These Tools
Every tool in this section is free and runs entirely in your browser on ToolBox. There are no uploads, no accounts, and no usage limits, so your files and data stay on your own device. Browse the full tool directory for everything else.