Free tools
Compress JPG, PNG, WebP and AVIF images instantly in your browser. Fast, private and free — no uploads, no registration.
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Images are decoded with createImageBitmap, optionally resized and transformed on a canvas (or OffscreenCanvas), then encoded with the browser’s native JPEG, PNG, WebP, or AVIF encoder. Nothing is sent to Web6 servers.
Smaller assets load faster on mobile networks, reduce bandwidth costs, and improve perceived performance. Pair compression with correct dimensions and modern formats for best results.
JPEG suits photographs. PNG suits graphics with sharp edges or transparency. WebP and AVIF often shrink photos further when the browser supports encoding. Availability varies by browser.
Your images never leave the device. Preferences may be stored locally; image binaries are not written to localStorage. Clear preferences anytime from the tool panel.
FAQ
Answers about formats, quality, privacy, batch compression, Shopify, and browser support.
An image compressor reduces file size so pages load faster. This Web6 tool re-encodes images in your browser using canvas and native encoders.
Yes. It is free, requires no account, and processes files only on your device.
No. Images are compressed entirely inside your browser. Web6 never uploads, stores, or views your files.
Drop or browse a JPG, choose High quality / Balanced / Maximum / Custom, then click Compress all and download the result.
Upload a PNG, optionally convert to WebP or AVIF for smaller photos, or keep PNG with optional lossless preference, then compress and download.
Lossless is limited. PNG can prefer lossless encoding. Lossy JPEG/WebP/AVIF trade some quality for smaller size. Use High quality mode when fidelity matters.
Yes. Upload up to 100 images (50 MB each), compress the batch, and download individually or as a ZIP.
Yes. Set output format to WebP if your browser supports WebP encoding, then compress.
Yes when your browser supports AVIF encoding. If AVIF is unavailable, choose WebP or JPEG instead.
After the page loads, compression runs locally. A network connection is not required to process images already on the page.
Yes. Compress product and theme images before uploading to Shopify to improve storefront performance.
Input: JPG, JPEG, PNG, WebP, AVIF, and GIF (first frame). Output: JPEG, PNG, WebP, AVIF (browser permitting), or keep original.
Version 1 decodes the first frame via createImageBitmap. Animated GIF re-encoding is planned for a later version.
Yes by default. Re-drawing on a canvas strips EXIF, GPS, camera, and author metadata from the output.
Yes. Resize by width, height, longest edge, shortest edge, or exact box. Aspect ratio and never-upscale options are available.
Yes. Rotate 90/180/270 and flip horizontally or vertically before encoding.
Each file may be up to 50 MB. Batches are limited to 100 images.
Re-encoding can increase size for already-optimized images. Try a lower quality, WebP/AVIF, or keep the original when the tool cannot shrink further.
No. Version 1 uses browser-native encoders for maximum privacy and performance without WASM encoder downloads.
Yes. After compression, use Download ZIP. Entry names are sanitized to prevent ZIP slip.
Not in version 1. Those formats are rejected with a clear message. HEIC is a version 2 idea.
Smaller images help page speed, which can support better user experience and Core Web Vitals. Compression alone does not guarantee higher rankings.
Yes. Focus the upload area and paste an image from your clipboard.
Yes. Use Upload folder where the browser supports directory selection.
Yes in Custom mode (0–100). Presets map to High (~92), Balanced (~80), and Maximum (~60).
Use side-by-side, slider, original-only, or compressed-only preview with fit / 100% / 200% / 400% zoom.
No. Analytics may record that an action occurred, but never filenames, pixels, EXIF, or file contents.
Yes. Keep original names, add a suffix/prefix, or use a pattern like image-{n}.
Compression yields between files so the interface stays responsive. You can cancel a running batch.
Use them in your CMS, Shopify files, or static assets. Prefer modern formats (WebP/AVIF) with JPEG/PNG fallbacks when needed.
Images are processed only in your browser. Need format conversion with SVG or PDF support? Try the Image Converter.