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310KB target — safely under 300KB portals. Medium locally, 100% private, instant download.
For to 310kb — 310KB.
100% Safe & Private – files never leave your browser
Browser-based compression via pdf-lib. No upload, no sign-up, instant.
or click to browse from your device
Single or multiple PDFs • No file size limit • No signup
Tip: For 310KB, try Medium first — switch to High if still over limit. All processing stays in your browser.
310KB is safely under 300KB portals.
Medium usually yields 280–320KB.
Check Saved % badge after each run.
Your Target
310KB
Fits most portals & email
Recommended Quality
Medium
Switch levels in widget until size fits
Privacy
100% Browser-Based
Files never leave your device
Everything for compress pdf to 310kb with Crafex.
Yes — 10KB buffer under portal cap.
Free, unlimited.
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