Browser-only image tool
Compress PNG to 100 KB
Compress a PNG image to 100 KB in your browser. No upload, no account. Works by reducing pixel dimensions while preserving PNG lossless quality — no colour degradation.
Compress your PNG to 100 KB — free, in your browser.
Open the tool → pick your PNG and set target to 100 KB
How it works (3 steps)
- Pick your PNG. The file stays in your browser — never uploaded to any server.
- Set target to 100 KB. The tool reduces dimensions to reach the file size while keeping PNG lossless encoding.
- Download. Get the compressed PNG instantly. Use it for the form or platform that requires PNG under 100 KB.
How PNG compression works — and why it differs from JPG
PNG is a lossless format — it preserves every pixel exactly. Unlike JPG, PNG cannot reduce file size by reducing quality. The tool reaches a 100 KB target by scaling down the image dimensions. For most logos, screenshots, and diagrams, dimension reduction at 100 KB keeps the image sharp and usable.
For precise file size control on photographs, switching to JPG or WebP output gives better results. JPG allows quality reduction as well as dimension reduction, making it much easier to land exactly at 100 KB while keeping the image large.
Perfect for...
- Logo resizing for portals that require PNG format
- UI screenshots for documentation and support tickets
- Form uploads requiring PNG under 100 KB
- Diagrams and flat-colour images that need lossless quality
Tips for PNG compression to 100 KB
- PNG works best for logos and screenshots — for photographs, switch to JPG output for better quality at the same file size.
- Transparency is preserved — keep PNG format if your image has a transparent background. JPG will add a white fill.
- Flat colours compress well — logos and diagrams with few colours will reach 100 KB at larger dimensions than complex photos.
- Check if JPG is accepted — if the upload portal accepts JPG, switch format for sharper results at exactly 100 KB.
FAQ
How do I compress a PNG to 100 KB?
Open UploadReady, pick your PNG, and set the target to 100 KB. The tool reduces image dimensions to reach the target. For complex images, switching to JPG output gives sharper results at exactly 100 KB.
Why does PNG compression work differently from JPG?
PNG is lossless — it cannot reduce quality, only dimensions. JPG can reduce both, giving finer control over file size. For precise size targets on photos, JPG or WebP is more reliable.
Will my PNG keep its transparent background at 100 KB?
Yes, if you keep PNG as the output format. PNG is the only common web format that supports transparency. Switching to JPG replaces transparency with a solid background (usually white).
What types of images work best as PNG at 100 KB?
Logos, UI screenshots, icons, diagrams, and flat-colour images. For photographs, JPG or WebP gives significantly better results at 100 KB.
Should I keep PNG format or switch to JPG for a 100 KB target?
Keep PNG if you need transparency or the portal requires PNG. Switch to JPG if the image is a photo and you want maximum quality at exactly 100 KB.
Does UploadReady send my PNG to a server?
No. All processing happens locally in your browser. Your PNG file never leaves your device. Close the tab and the image is gone.