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Image Compressor

Compress JPEG, PNG, WebP, and AVIF images up to 80% smaller while preserving visual quality. Batch processing supported. Free, no signup required.

100% free Browser-only processing Files never leave your device
CompressConvertResizeRemove BGOCR
Upload Image

Drop image here or click to upload

JPEG, PNG, WebP, AVIF supported

Quality: 80%
Output:

100% free, processed in your browser

Compressed image appears here

Upload an image, adjust quality, and hit Compress.

Files processed locally — never uploaded

Also try: AI Humanizer · Summarizer · Rewriter 3 free uses/day

How It Works

1

Upload Your Image

Drop or select a JPEG, PNG, WebP, or AVIF image. Files stay on your device — nothing is uploaded.

2

Adjust Quality & Format

Set the quality slider (80% is usually ideal) and pick an output format. WebP and AVIF give the best compression.

3

Download & Compare

See the before/after comparison, check the file size reduction, then download your compressed image.

FAQ

How does the image compression work?
We use your browser's built-in Canvas API to re-encode the image at a lower quality level. No data is sent to any server — everything happens locally on your device.
Which formats are supported?
You can compress JPEG, PNG, WebP, and AVIF images. Choose any output format, or keep the original. AVIF offers the best compression but requires a modern browser.
Will compression reduce image quality?
Yes, slightly. The quality slider lets you control the trade-off between file size and visual quality. At 80% quality, most images look identical to the original while being significantly smaller.
Can I compress multiple images at once?
Yes! Switch to batch mode, drop up to 20 images, and compress them all at once. Each result shows individual size savings and can be downloaded separately or all at once.
What does the before/after comparison show?
After compression, drag the slider on the comparison view to see original vs compressed side by side. This helps you find the sweet spot between quality and file size.
Is there a file size limit?
There's no hard limit since processing happens in your browser. Very large images (50MB+) may be slow depending on your device.
Is my image data private?
Absolutely. Your images never leave your device. All processing is done client-side using the HTML5 Canvas API. We don't upload, store, or see your images.
How does this compare to TinyPNG or Squoosh?
Unlike TinyPNG, our compressor runs entirely in your browser — no upload, no waiting for a server response, and no daily limits. Squoosh is also client-side but limited to single files. We support batch compression of up to 20 images at once.
Does it work on mobile phones?
Yes. The tool works in any modern mobile browser (Safari, Chrome, Firefox). The Canvas API is fully supported on iOS and Android. Large images may process slower on older phones.
Can I compress images without losing transparency?
PNG and WebP preserve transparency. If you compress a transparent PNG to JPEG, the transparent areas will turn white. Use our <a href="/image-converter">Image Converter</a> if you need to switch formats while keeping transparency.
What is the best format for web images?
WebP offers the best balance of quality and file size for most web use cases — 25-35% smaller than JPEG at equivalent quality. AVIF is even smaller but has limited browser support. Use our <a href="/image-converter">Image Converter</a> to compare all formats side by side.
Can I undo compression after downloading?
No. Lossy compression permanently discards image data. Always keep your original file. If you need to resize the compressed image later, use our <a href="/resize-image">Image Resizer</a>.
Why did my file get larger after compression?
This can happen when converting between formats (e.g., JPEG to PNG) or compressing an already-optimized image. Try lowering the quality slider or switching to WebP format for smaller output.

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View all plans — from $9.99/mo 3 free uses/day, no signup

Coda One's Image Compressor reduces JPEG, PNG, WebP, and AVIF file sizes using your browser's Canvas API. Adjust the quality slider to balance file size and visual quality. Compare before and after with the built-in comparison slider. Batch-compress up to 20 images at once. All processing happens locally — your images are never uploaded to any server. Free, unlimited, no signup required.

More:  All Image Tools  · Compress  · Convert  · Resize  · Remove BG