Signature Photo Compressor to 30 KB
Signature uploads often reject files over 30 KB. Drop the photo below — the compressor binary-searches quality until the file fits 30 KB while keeping the resolution your portal or app accepts.
or click to choose · paste with Ctrl+V · JPG / PNG / WebP
Files never leave your browser compression runs locally on your device
Measured Benchmark on This Page
| Input | Output | Time | Encoder passes |
|---|---|---|---|
| 2.78 MB JPEG photo | 29.7 KB (target 30 KB) | 1.46s | 21 |
reference runner (Python/Pillow, same binary-search algorithm). Your browser uses the same binary-search algorithm — results vary slightly by device.
How It Works
- Take or scan your signature photo.
- Drop it below — target preset to 30 KB.
- Download and upload the result to the portal.
FAQ
Will it keep the resolution I need for a signature photo?
The compressor prefers lowering JPEG quality over shrinking pixels, so dimensions are preserved whenever possible. Use the format selector if the portal requires JPG.
Is my photo uploaded anywhere?
No. All compression happens in your browser — nothing is sent to a server.
Why exactly 30 KB?
Most signature portals reject files above 30 KB; hitting the target on the first try avoids resubmission loops.