Local processing · no uploads
Convert Image Format Online
Pick an output format — JPEG, PNG or WEBP — and re-encode your images locally. Add a target file size if the destination also has a KB limit.
Drag & drop images here
JPG, PNG, WEBP, HEIC, GIF, BMP or AVIF · up to 30 files at once
Files are processed on your device and never uploaded
Format comparison
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| JPEG | Lossy | No | Photos, upload forms, passport and visa portals |
| PNG | Lossless | Yes | Screenshots, logos, images needing exact pixels |
| WEBP | Lossy or lossless | Yes | Web pages — roughly 30% smaller than JPEG |
Related tools
Why this compressor actually reaches your limit
Exact target file size
Say “200KB” instead of guessing a quality percentage. A binary search finds the highest quality that still fits your limit.
Batch compression
Add up to 30 images, optimize them in one run, and download everything as a single ZIP archive.
100% private
Images are decoded and re-encoded on your own device with the Canvas API. Nothing is uploaded to any server.
Automatic resizing
When quality reduction alone cannot reach the target, pixel dimensions are reduced step by step until it fits.
Your images never leave your device
Compression runs in a Web Worker inside your browser using the HTML5 Canvas API. There is no upload step, no temporary storage and no server-side copy — which is exactly why passport photos, ID scans and exam documents are safe to process here. Read the privacy policy.
Frequently asked questions
Which format should I choose?
Use JPEG for photos and any upload form with strict format rules, WEBP for web pages where you want the smallest file, and PNG only when you need lossless pixels or transparency.
Will transparency survive the conversion?
PNG and WEBP keep the alpha channel. Converting to JPEG flattens transparent pixels onto a white background because JPEG has no alpha channel.
Can I convert and set a file size limit together?
Yes. Choose the output format, switch the target file size on, and the encoder searches for the highest quality that fits your limit in the new format.