Which format gives the best compression?

WebP typically gives 25–35% smaller files than JPEG at the same visual quality, and up to 26% smaller than PNG. For maximum compression with broad browser support, use WebP.

Does compression affect image quality?

JPEG and WebP use lossy compression — each re-save degrades quality slightly. PNG is lossless. For web use, a quality setting of 75–85% is usually imperceptible to the human eye while achieving significant file size reduction.

Is there a file size limit?

No hard limit, but very large images (>20MB) may be slow to process in the browser. For batch processing many large images, a native tool like ImageMagick or Squoosh CLI may be faster.

Image Compressor

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Output format

Quality 80%

Drop images or click to upload

JPG, PNG, WebP, GIF — processed in your browser

All processing happens in your browser — images are never uploaded.

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About Image Compressor

Compress one or multiple images at once directly in your browser using the Canvas API. Drag and drop multiple files, choose output format (JPEG, WebP, or PNG) and quality level, and download compressed versions instantly. Shows original vs. compressed file size and percentage reduction for each image. 100% client-side — your images never leave your device.

All processing happens entirely in your browser using modern web APIs. Nothing is uploaded to our servers — your data stays local and private. Free to use forever.

Common use cases

Reducing image file sizes before uploading to a website or CMS
Optimizing images for faster page loads and better Core Web Vitals scores
Converting PNG images to JPEG or WebP for smaller file sizes
Batch compressing multiple product photos before uploading to an e-commerce store
Reducing image attachment sizes before sending in emails

How it works

Uses the browser's Canvas API: the image is drawn onto an HTML <canvas> element at its original dimensions, then exported using canvas.toBlob() with the chosen MIME type and quality parameter (0.0–1.0). JPEG and WebP support lossy compression via the quality parameter. PNG is always lossless — to reduce PNG size, convert to WebP instead. All work happens in your browser's rendering engine.

How to use

Paste your input into the field above.
Adjust any options to fit your use case.
Copy the result or use it directly.

FAQ

Which format gives the best compression?: WebP typically gives 25–35% smaller files than JPEG at the same visual quality, and up to 26% smaller than PNG. For maximum compression with broad browser support, use WebP.
Does compression affect image quality?: JPEG and WebP use lossy compression — each re-save degrades quality slightly. PNG is lossless. For web use, a quality setting of 75–85% is usually imperceptible to the human eye while achieving significant file size reduction.
Is there a file size limit?: No hard limit, but very large images (>20MB) may be slow to process in the browser. For batch processing many large images, a native tool like ImageMagick or Squoosh CLI may be faster.

About Image Compressor

Common use cases

How it works

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