You need to send a photo by email but it’s 8MB. You need to upload a product image but the CMS has a 2MB limit. You need to speed up your website but your hero image is 4MB. The solution is always the same: compress the image. But most tools upload your photo to a random server first.
Here’s how to compress images without uploading them anywhere, using only your browser.
The 30-Second Method
- Open QuickShrink
- Drag your image onto the page (or click to select)
- Adjust the quality slider — 80% gives great results for most photos
- Click Download
That’s it. Your image never leaves your device. The compression happens entirely in your browser using the Canvas API — the same technology that powers web-based photo editors.
What Quality Setting Should I Use?
80% — Best for most photos. Reduces file size by 40-60% with no visible difference. This is what most professional websites use.
60% — Good for thumbnails, social media, and email attachments. 70-80% smaller. You might notice slight softening if you zoom in, but it looks perfect at normal viewing size.
40% — Maximum compression. 85-90% smaller. Visible artifacts on close inspection, but fine for previews and low-bandwidth situations.
100% — No compression. Use this only if you need to convert PNG to JPEG without quality loss.
Why Not Use TinyPNG or Squoosh?
TinyPNG uploads your image to their servers. For personal photos or client work, that’s a privacy concern. Also limited to 20 free compressions per month.
Squoosh (by Google) is excellent and also runs client-side. But it’s heavier — loads a WASM codec and has a complex UI. If you just want to shrink a photo fast, it’s overkill.
QuickShrink is a single HTML file, loads in under 200ms, works offline, and does one thing: make your image smaller. No account, no limits, no tracking.
👉 Try QuickShrink — free, forever, private by design.
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