How do I make a PDF smaller than 1 MB?

1. Drop the PDF on the 1 MB compressor. Compress PDF to 1 MB is pre-set to the target: it rebuilds the pages and steps down image quality until the file fits, then stops — no more quality is spent than needed.
2. Trim pages you don’t need. If the result lands above target or looks rough, remove pages first. A 12-page scan sharing a 1 MB budget gets ~85 KB per page; delete the irrelevant pages with the PDF page remover and re-compress.
3. Check the result before uploading. Open the downloaded file once. The size badge shows the exact bytes; portals that say "1 MB" almost always accept it, since the tool undershoots the boundary safely.

Typical phone-scanned documents of a few pages compress from 5-15 MB to under 1 MB with clearly readable text. Dense 50-page reports may not fit — the tool tells you honestly instead of producing an unreadable file.

What actually makes PDFs huge?

Scans and photos. A single page photographed at 12 megapixels is a multi-megabyte JPEG, and scanner apps happily stack ten of them. Text you typed, by contrast, is nearly free — a 100-page text-only contract can weigh 300 KB. That is why "compressing" a text PDF does little, while a scanned one shrinks 10-20×.

What doesn’t work?

Zipping a PDF barely helps — its images are already compressed. Printing to PDF again often makes files bigger. And uploading your ID, contract or medical scan to a random compression site works, but hands a stranger the exact documents you least want on someone else’s server; a browser-local tool exists so you don’t have to.