Compress JPEG to 30KB Online
Drop your JPEG — it lands at 30KB automatically, ready for upload.
100% in your browser — files never uploaded
Why 30KB is a common upload limit
A 30KB ceiling shows up across signature and photo uploads on exam and recruitment portals. This page opens directly in Target Size mode with 30KB pre-filled, so there's no slider to guess with — drop your JPEG and download.
How the 30KB target is reached
Output is locked to JPEG, so the binary search adjusts quality first and only reduces pixel dimensions if quality alone can't reach the target, re-encoding until the file lands at or just under 30KB — most single-subject photos and scanned signatures reach this comfortably without visible quality loss.
Need a different KB target?
If your portal asks for a different limit, the Target Size field stays fully editable — type any other KB value instead of the 30KB this page starts with.
Compress JPEG to 30KB in One Step
This tool is Compress JPEG pre-set to a 30KB target, so there's no mode to switch and no slider to guess with — drop your file and output is locked to JPEG, so the binary search adjusts quality first and only reduces pixel dimensions if quality alone can't reach the target. Everything happens locally via the Canvas API, so photos and ID documents never leave your device.
When 30KB Is the Number a Portal Asks For
A 30KB ceiling shows up repeatedly across signature and photo uploads on exam and recruitment portals — files over it are rejected outright, often without saying by how much. Rather than repeatedly saving at guessed quality settings, this page starts already locked to 30KB, so the first attempt is the only attempt needed. JPEG's lossy encoding means quality is the primary lever — each re-save after this one will cost a little more detail (generation loss), so always compress from the original file.
Switching Targets or Formats
If your form specifies a different KB limit, the Target Size field on this page stays fully editable — type any value and the same search applies. For format conversion or batch processing multiple files, the full Compress JPEG tool covers the same engine with every mode exposed.
Frequently asked questions
How do I compress a JPEG to exactly 30KB?
Drop your JPEG here — Target Size mode is already set to 30KB, so the tool immediately searches for the largest file that still fits under that limit.
Will my JPEG be uploaded to a server?
No. Compression runs entirely in your browser using the Canvas API — the file never leaves your device.
Can I change the target away from 30KB?
Yes — the Target Size field stays editable, so you can type any other KB value if a different portal needs it.
Will compressing to 30KB visibly hurt quality?
Most single-subject photos and scanned signatures reach this comfortably without visible quality loss; the live preview shows the exact result before you download.
Related tools
Data verified: 2026-07-17 · All processing happens in your browser — no files are ever uploaded.