Compress PDF under 1MB online — free
Reduce any PDF to under 1 MB while keeping it readable. Free, in-browser, auto-deleted in 1 hour.
Email attachments often max out at 10 MB or less, but many corporate filters and government portals are stricter — 1 MB is a common ceiling. PDFOnly's compressor squeezes most documents under 1 MB while keeping the text crisp and the layout untouched.
We use Ghostscript with content-aware downsampling: text is preserved at full resolution, and embedded images are intelligently downsampled. Most documents shrink 60–85%.
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Frequently asked questions
Why does my PDF need to be under 1 MB?
Banks, government portals, insurers, and university applications often enforce a 1 MB attachment cap. Email systems can also reject larger attachments depending on policy.
Will compression hurt scanned documents?
Use the Recommended preset for scans. If you need them under 1 MB and they're still too large, run them through OCR first, then compress — searchable text compresses better than images.
Is there a hard limit on input size?
Free: 100 MB upload. Pro: 200 MB. Team & Enterprise: 1 GB+.