Image Compressor

How this image compressor works

Drop one or more images and the tool decodes each file in the browser, redraws it onto an HTML canvas, and re-encodes it with your chosen format and quality. The before-and-after slider shows the exact byte savings for every file. None of your images ever leave your device.

WebP and JPEG encode instantly using the browser's native canvas.toBlob encoder, so the quality slider updates the output live. AVIF uses a small in-browser WASM encoder that downloads once on first use, then runs offline. PNG is re-rasterized losslessly.

The quality slider, explained

For lossy formats, the slider maps directly to the encoder's quality parameter from 5 to 100. Lower values discard more high-frequency detail to make the file smaller. For most photographs, 75–85 is visually indistinguishable from the original at a fraction of the size.

PNG is lossless, so the slider is disabled when PNG is selected. If you need a small PNG, switch to WebP instead — lossy WebP routinely beats PNG by 60–80% on photos and still beats it on most flat graphics.

Why compress images before publishing

Image weight is the single biggest contributor to slow pages. Large files hurt your Largest Contentful Paint, drain mobile data, and push back the moment a visitor sees your hero shot. Compressing to WebP or AVIF often cuts page weight in half with no visible quality loss.

It matters even more for AI-generated work. Models like Imagen often output large, high-bitrate stills. Before you ship a generated hero image, an ad frame, or a thumbnail, run it through this compressor to drop it to a web-ready size without re-rendering and spending more credits.

When to resize as well as compress

Compression lowers the bytes per pixel; resizing lowers the pixel count. The two stack. A 4000px-wide render displayed at 1200px is wasting most of its data. Use the resize control to cap the longest edge — 1920px for full hero images, 1280px for in-body shots, 1080px for vertical social — then let the quality slider do the rest.

Private by design: why no upload matters

Most popular online compressors upload your image to their servers, apply a file-size cap, and queue your job behind everyone else's. This tool does the opposite. The work happens on your own CPU, so there is no upload, no cap, and no privacy trade-off for client work, screenshots, or unreleased assets.

Because it is browser-side, you can compress a folder of images on a plane, on a locked-down corporate network, or anywhere offline once the page has loaded. Closing the tab erases everything — the tool keeps no copies.

Compress, then create at scale in Playcut

This compressor is the polish step. When you need to produce the visuals in the first place, Playcut routes prompts across Imagen, Veo, Gemini, and more from one chat surface, with brand kits and reusable AI actors. Generate a batch of stills, export them, then compress here before they ship.

Paid AI tools meter by credits. Playcut's plans run from Hobby at $9/mo (500 credits) to Pro at $29/mo (2,000 credits), Studio at $79/mo (6,000 credits, 4 seats), and Agency at $149/seat/mo (10,000 credits/seat). Credit packs that never expire start at 600 credits for $9 (as of May 2026).

Image compressor FAQ

Is this image compressor really free with no upload?

Yes. The image compressor runs entirely in your browser using the Canvas API. Your files are decoded, re-encoded, and downloaded locally — nothing is ever sent to a server, so there is no file-size limit, no signup, and no queue.

Which format gives the smallest file size?

AVIF is usually the smallest at the same visual quality, followed by WebP, then JPEG. WebP is the best default because every modern browser supports it and it encodes instantly. AVIF squeezes 20–40% smaller but uses a WASM encoder that downloads once on first use.

Does compressing an image reduce its quality?

Lossy formats (JPEG, WebP, AVIF) trade some detail for a smaller file, controlled by the quality slider. Quality 75–85 is visually lossless for most photos. PNG is lossless, so its quality slider has no effect — it only re-rasterizes the image.

What is the best quality setting for web images?

For photographs, set WebP or JPEG to about 80. For graphics with text or flat color, use 85–90 or stay on PNG. Combine compression with the resize control to cap the longest edge at 1920px for hero images or 1080px for in-body shots.

Can I compress multiple images at once?

Yes. Drop several images and the same format, quality, and resize settings apply to all of them. Each image shows its own before-and-after byte comparison and its own download button, so you can grab them one at a time.