01
Drop your image
Add a JPG, PNG, WebP, AVIF or HEIC. Everything runs locally — nothing is uploaded.
Auto-tuned in your browser — no uploads
Compress Image to 500 KB
Get any photo under 500 KB — Resizor finds the best quality that fits, entirely in your browser. No upload, no watermark.
Many upload forms, email systems and government portals cap how large an image can be — a profile photo under 100 KB, a document scan under 500 KB, an attachment under 1 MB. Resizor's compress-to-size tool hits those limits exactly: pick a target and it automatically finds the highest quality that still fits, right in your browser.
There's no upload and no server — compression runs locally with wasm-vips. Drop in a JPG, PNG, WebP, AVIF or HEIC, choose JPEG, WebP or AVIF out, and compare the result with the before/after slider before downloading. It's free, private and watermark-free.
// Three steps
How it works
02
Pick a target size
Choose 50 KB, 100 KB, 500 KB, 1 MB or type a custom size. Resizor finds the quality that fits.
03
download
Compare the before/after, then download a file at or under your target — as JPEG, WebP or AVIF.
// Good to know
Frequently asked questions
Q1How does compressing to an exact size work?
Resizor re-encodes your image at many quality levels and keeps the highest-quality one that still fits under your target — so you get the best image possible at your chosen file size, all in your browser.
Q2Which formats can I compress to?
JPEG, WebP and AVIF. These are lossy formats whose quality can be tuned to hit a size target. PNG is lossless, so it can't be dialed to an arbitrary file size.
Q3What if my target is too small to reach?
If even the lowest quality is still larger than your target, Resizor gives you the smallest version it can produce and tells you. Reducing the image dimensions first helps reach very small targets.
Q4Are my images uploaded anywhere?
No. Compression runs entirely on your device with wasm-vips (WebAssembly). Your images never leave your browser, and there's no watermark.
Q5Does compressing reduce quality?
Lossy compression always trades a little quality for size, but at moderate targets the difference is usually invisible. Use the before/after slider to check before you download.
Hit any size target, privately
Compress images to an exact KB or MB right in your browser — no uploads, no watermark.