Compress an image to under 300 KB at 300×300 px — Free Exact-KB Tool
300×300 px · 300 KB
- 300×300 px · 300 KB
- Exact 300×300 px
- 100% Private (No upload)
- Free & instant
1 Select your photo or signature
Tap to browse or drop your photo or signature here
JPG or PNG photo/signature. Processed 100% locally on your device.
Choose File 2 Target file size & options
KB
px
px
3 Compress & download
⚡ 100% free · Runs privately on your device · Takes ~0.5 seconds
How it works
- Drop your file (JPG / PNG / PDF) into the box below — nothing is uploaded anywhere.
- The preset is pre-loaded at 300×300 px with the under 300 KB target; adjust the boxes if your portal differs.
- Hit Compress — the engine binary-searches ≈ 8 encode passes in under a second.
- Download the file. If the portal has a minimum-KB rule, padding bytes keep it safely inside the range.
Frequently asked questions
Is this photo / signature compressor free?
Yes — 100% free with no watermark, no signup and no daily limit. All processing happens inside your own browser via canvas/JPEG encoding, so there are no server costs to pass on to you.
What are the exact file requirements?
This page expects 300×300 px pixels with a size of under 300 KB. This tool is pre-configured for exactly those numbers — just drop your file and click Compress.
Is my photo or document uploaded to a server?
No. Unlike ilovepdf, tinypdf or similar tools, this page has no upload at all — compression runs on your device with JavaScript. It even works offline once the page has loaded.