Compression
Upload limits are the usual culprit — a form that caps at 50 KB, an email that rejects 25 MB. These tools let you aim at a specific size and see exactly what you traded away to get there.
19 tools · all free · no sign-up
Compress PDF
Reduce PDF file size for email and upload limits.
Open toolCompress Image
Shrink JPG, PNG and WebP files, with a size target if you need one.
Open toolCompress PDF to 100KB
Get a PDF under 100 KB.
Compress PDF to 200KB
Get a PDF under 200 KB.
Compress PDF to 500KB
Get a PDF under 500 KB.
Compress PDF to 1MB
Get a PDF under 1 MB.
Compress PDF to 2MB
Get a PDF under 2 MB.
Compress Image to 20KB
Hit a 20 KB limit exactly.
Compress Image to 50KB
Hit a 50 KB limit exactly.
Compress Image to 100KB
Hit a 100 KB limit exactly.
Compress Image to 200KB
Hit a 200 KB limit exactly.
Compress Image to 10KB
Hit a 10 KB limit exactly.
Compress Image to 15KB
Hit a 15 KB limit exactly.
Compress Image to 30KB
Hit a 30 KB limit exactly.
Compress Image to 300KB
Hit a 300 KB limit exactly.
Compress Image to 500KB
Hit a 500 KB limit exactly.
Compress Image to 1MB
Hit a 1 MB limit exactly.
Compress Image to 2MB
Hit a 2 MB limit exactly.
Signature Resize
Meet exact signature dimensions and file size limits.
Aim at a size, not at a quality setting
Most compression tools give you a quality slider from 1 to 100 and leave you to guess. That is the wrong shape for the problem almost everyone actually has, which is a form refusing a file because it is over a stated limit. You do not want quality 68; you want the best-looking file that fits under 50 KB.
The target-size pages here invert it. You state the number the form gave you, and the tool searches for the highest quality that still fits — by binary search for images, and by stepping down a ladder of resolution and quality settings for PDFs. It then shows you the original and the result side by side so you can judge whether the trade was acceptable before you commit to it.
Where a target is genuinely unreachable, the tool says so rather than silently producing something unusable. A detailed photograph cannot become a recognisable 10 KB file, and a fifty-page scan cannot become a legible 100 KB PDF. In those cases the honest fix is usually to send less: fewer pages, or a smaller crop.