Compress to 500KB Free, Fast & Secure.
Reduce image file size to 500KB online for free. No upload — all processing in your browser.
Drag & Drop images here
Supported: JPG, PNG, WEBP, TIFF, HEIC, AVIF
You can also click to select files.How It Works
100% free, secure, and runs entirely in your browser. No uploads, no registration.
Upload Your Image
Click 'Select Images' or drag and drop. Supports JPG, PNG, WebP, and TIFF.
Auto-Compress to 500KB
The tool automatically compresses your image to 500KB while preserving the best possible quality.
Download Instantly
Hit 'Compress Image' and download your optimised file in seconds. No registration needed.
Why Use ImageResize.co?
100% free, secure, and runs entirely in your browser. No uploads, no registration.
Automatic Target Compression
Our algorithm finds the right quality level to meet the 500KB target automatically.
No Visible Quality Loss
Smart compression removes hidden data and metadata without degrading the visual appearance.
100% Browser-Based
Your images never leave your device — no uploads, no servers, no privacy concerns.
All Major Formats
Compress JPG, PNG, WebP, and TIFF. Change output format during compression.
Instant Preview
See the compressed result before downloading so you can adjust quality if needed.
Free with No Limits
Unlimited use, no watermarks, no sign-up. Process as many images as you need.
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Frequently Asked Questions
Everything you need to know
Yes, in most cases. The tool reduces file size by lowering quality incrementally until the 500KB target is reached. You can preview the result before saving.
At moderate settings, no. The compressor preserves sharpness and colour. At very high compression, some softening may occur — the preview lets you judge before downloading.
No server-side limit exists because processing is entirely in your browser. Files up to 50MB work well on most modern devices.
No. Every step happens locally in your browser. Your images are never sent to any server.
Yes. Save the output as JPG, PNG, or WebP regardless of the input format.