CSV Compressor — Compress CSV Files Online Free
Compress CSV files in your browser. Archive data into a max-compression ZIP, shrinking by up to 90% with every row preserved — free, private, no upload, no sign-up.
Drop your CSV file here, or click to browse
Files are processed in your browser — nothing is uploaded.
What is a CSV compressor?
What is it
A CSV compressor reduces the size of a CSV file by archiving it into a ZIP at maximum compression. Because CSV is repetitive text, it compresses extremely well — often by 70–90%.
filecompressor.app does this losslessly in your browser, so every row and column is preserved exactly when you extract the result. Your data never gets uploaded.
How to compress a CSV file
How to use
Compressing CSV is fast and lossless:
- 1
Drop your CSV file into the dropzone above, or click to browse.
- 2
The compressor archives the data into a max-compression ZIP, then shows the new size and percentage saved.
- 3
Click Download to save the ZIP. Extract it anytime to get your original CSV back, unchanged.
Why use this CSV compressor?
Why use it
Lossless — every row, column, and value is preserved.
Reduces CSV size by up to 90% thanks to efficient text compression.
100% private — data is processed in your browser and never uploaded.
Free with no sign-up, no watermarks, and no limits.
Output is a standard ZIP, openable on any device.
FAQ
Common questions about this compression tool.
Frequently Asked Questions
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