Compare two files online without uploading them
This online diff tool is built for comparing text, code, JSON, CSV, and readable documents when privacy matters. Paste content directly, upload two files, or compare exported API responses and configuration files without sending anything to a backend.
Common use cases include checking changes between JSON payloads, reviewing copied code snippets, validating document revisions, and spotting whitespace or case-only differences during debugging.
Note: Binary executables and media files are blocked for browser stability.
How to use it
Paste or upload the original content on the left, add the modified version on the right, choose view settings, then run the comparison.
Best for developers
Compare JSON API responses, config files, SQL, Markdown, logs, or source code when you need a quick browser-based diff checker.
Private by design
Comparisons happen locally in your browser, so sensitive code and documents stay on your device.
Frequently asked questions
Can I compare two JSON files online?
Yes. The tool works well for JSON, especially when you want a quick visual diff between API responses, configs, or exported data.
Does it work for code snippets and text files?
Yes. You can compare plain text and common source code formats with syntax highlighting enabled.
Are my files uploaded?
No. Everything stays on your device, which is useful for sensitive code, internal documents, or private datasets.