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Compress, resize, crop, convert and watermark images in a single workflow - with live before/after preview and bulk processing.
What is compress image online free?
Image compression reduces file size by removing redundant data - making images load faster on websites, easier to share over email, and cheaper to store. Vakru compresses images entirely in your browser using the Canvas API, so your files are never uploaded to any server. Supports JPG, PNG, WebP, GIF and BMP. Free, unlimited, no sign-up.
How it works
Shrink images to 50KB, 100KB or 200KB without losing visible quality - everything processed locally in your browser.
Upload your image
Drag & drop or click to select JPG, PNG, WebP, GIF or BMP files from your device. Files never leave your browser.
Choose a target size
Pick a preset like 50KB, 100KB or 200KB, or enter a custom KB/MB target. The compressor finds the best quality that fits.
Preview before & after
Compare the original and compressed image side by side so you can confirm the quality before saving.
Download compressed image
Save the smaller image instantly with one click - no signup, no email, no watermark.
💡 Pro Tips
Use WebP for web images
WebP delivers 25 -35% smaller files than JPG at the same visual quality. All modern browsers support it.
75 -85% quality is the sweet spot
For photos, this range cuts file size by 60 -80% with almost no visible degradation - use the slider to find your balance.
Keep PNG for graphics & logos
PNG is lossless and preserves sharp edges and transparency. Use it for screenshots, UI assets, and logos.
Resize before compressing
A 6000px photo displayed at 800px is wasteful. Use the Resize tool first, then compress - the savings stack up.
Frequently Asked Questions