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or click to choose · or paste
JPG, PNG, WebP, GIF, AVIF · up to 20 at a time free · unlimited with Pro ($7 once)
Presets:
| File | Before | After | Saved | Size |
|---|
“Download all as ZIP” is part of WBS Tools Pro ($7 one-time). Free: use each Download button.
How it works
- Drop one or more images (or paste a screenshot).
- Pick Quality for a quick squeeze, or Target size to hit a limit like 100 KB for a form upload.
- Download each result. The original file is untouched.
Step-by-step: How to compress an image to 100 KB without uploading it. Need a different format or exact dimensions? Use the image converter & resizer.
More guides: photo and signature under 20 KB or 50 KB for online forms · compress an image for Discord · reduce photo size for email.
Questions
Are my images uploaded?
No. Compression happens inside your browser using its built-in image encoder. The images never leave your device, so it also works offline once the page has loaded.
How do I compress an image to 100 KB (or 20 KB, 50 KB, 1 MB)?
Choose Target size, type the size in KB (or tap a preset), and drop your image. The tool picks the highest quality that fits. If even the lowest quality is too big, it shrinks the dimensions until the image fits.
Which formats work?
JPG, PNG, WebP, GIF (first frame), BMP and AVIF where your browser supports it. HEIC/HEIF iPhone photos open in Safari. Output can be JPG, WebP or PNG.
Why did my PNG barely shrink?
PNG is lossless, so a browser can't make it much smaller without changing the format. Choose WebP or JPG output for big savings, or resize it.
Is it really free?
Yes. There is no sign-up, watermark or daily limit. The free version takes up to 20 images at a time. Optional WBS Tools Pro ($7 once) removes the batch limit and adds Download all as ZIP.