About FitsUnder

Upload forms everywhere say the same thing: “maximum 2 MB”, “up to 200 KB”, “file too large”. The usual answer is a compressor with “low, medium, high” settings — and a few rounds of guessing until something passes.

FitsUnder turns the question around. You tell it the limit; it finds the best-looking version of your file that is guaranteed to be under it. No settings, no account, no watermark.

Everything runs in your browser, so it is fast and private: documents like passports and contracts never leave your device.