CSV diff · viewer · cleanup · free & open
Diff, view, and clean
CSV files in your browser.
Compare two CSVs side by side, open a single file in a fast viewer, and clean it up with color rules, fill blanks, and bulk replace. 100% on device— your data never leaves the browser. AI summaries with your own Gemini or OpenRouter key.
100% client-sideNo sign-inFree forever
01 · Start here
Drop your two files.
CSV or JSON. Drag & drop, click to browse, or load sample data to explore the interface first.
100% in-browser
File A
Drop file or click
.csv.json
vs
File B
Drop file or click
.csv.json
What you get
Diff, view, and clean — in one tab.
Built for the full CSV workflow: compare two versions and ship a clean merge, or open a single file and clean it up with color rules, fill blanks, bulk replace, and column formats.
How it works
Three steps, zero setup.
Blog
Guides & insights.
Practical walkthroughs on comparing CSV files online — from picking the right match key to validating data migrations and using AI to summarise what changed.
FAQ