Compress a PDF to 500 KB
500 KB is the comfortable middle: small enough to email or attach to almost any application form, large enough that most documents keep readable quality. This tool is preset to aim there — drop your PDF and get a version that fits under half a megabyte, without ever uploading the file.
Drop PDF files here or click to select
Preset target: 500 KB
Why 500 KB is the size to aim for
It clears the two limits people hit most often: email attachment caps (well under the usual 10–25 MB, so it sends instantly) and the "max 500 KB" or "max 1 MB" fields on job, visa, and banking forms. Unlike a 100 KB target, 500 KB usually leaves enough headroom that a multi-page document survives with legible text and images — often via a gentle resave or a light resolution reduction rather than heavy crushing.
If your file is already small
The tool tries a lossless re-save first. If your PDF is, say, 700 KB with redundant structure, that single step may already drop it under 500 KB with no quality loss at all — text stays selectable, images stay sharp. It only reaches for rasterisation when the gentle path isn't enough. Want an even smaller file for a tight form? Aim at 100 KB instead, and read the caveats there.
FAQ
How do I compress a PDF to 500 KB?
Drop it into the tool above — it's preset to a 500 KB target and stops at the highest quality that still fits. Everything runs in your browser; nothing is uploaded.
Will my text stay selectable at 500 KB?
Often yes — 500 KB is roomy enough that many documents meet it with the lossless pass alone, which keeps text selectable. Larger or image-heavy files may still get rasterised to fit.
Can I use this to get under a 1 MB email limit?
Absolutely — 500 KB is comfortably below a 1 MB cap and sends fast. If you specifically need to preserve quality and 1 MB is fine, set the target to 1024 in the flexible compressor.