Clean — by Similarity API
Pick the right tool for the job
Compare two files, dedupe a single list, or build it into your product with the API.
Compare two things
Two lists or files
From a bare list of usernames to structured CSVs with shared keys — pick the shape that matches your data.
Compare two lists
Drop two lists and get what's only in A, only in B, and in both. Handles Instagram & TikTok exports.
CSV diff tool
Compare two versions of the same file — get added, removed, changed and unchanged rows.
Join two CSV files
Combine two files on a shared column or combination of columns.
Fuzzy match two CSV files
Cross-match two files to find overlaps and net-new rows, even with messy text.
Clean one file
Single-file dedupe
Find and remove fuzzy duplicates inside one spreadsheet.
Track over time
Instagram tracking
Get told who followed and unfollowed any public account, checked every week.
Convert files
Convert between formats
A free, fast file converter for PDFs, images, documents, spreadsheets, and more.
For developers
Build it into your product
The same engine that powers these tools, available as an API.