Image Compressor
Drop an image here or click to choose a file
Compression runs in your browser via canvas — the image never leaves your device.
About the Image Compressor
This tool compresses and resizes images entirely in your browser using the canvas API. Pick an output format (JPEG, WebP, or PNG), adjust the quality slider, optionally cap the width, and download the result.
Because everything runs locally, your photos never touch a server — there is no upload, no queue, and no privacy trade-off. It works offline once the page is loaded.
How to compress an image
- Drop an image onto the upload area or click to choose a file.
- Pick the output format — WebP usually gives the smallest files.
- Adjust quality and, if needed, set a maximum width to downscale.
- Compare the before/after sizes and download the compressed image.
Tips
- Resizing usually saves more than quality reduction — do not ship 4000px images into small layouts.
- Quality 75-85 is the sweet spot for photos; artifacts appear quickly below 60.
- Use PNG only for graphics with sharp edges or transparency — photos as PNG are huge.
- Keep the original file; lossy compression cannot be undone.
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Resize before compressing
Do not ship a 4000px image into a 400px slot. Cutting dimensions saves more than any quality slider.
Pick the right format
WebP usually beats JPEG at the same quality; PNG is for graphics with sharp edges or transparency.
Inspect artifacts at 100%
Aggressive quality settings show banding and blocking around text and gradients. Zoom in before publishing.
Keep the original
Lossy compression is irreversible. Store the source file so you can re-export with different settings later.
Privacy and usage
Built for quick checks without an account
Toolinix tools are designed for short developer tasks: paste a safe sample, inspect the result, copy what you need, and move on.
No login required
You can use the tools without creating an account, subscribing to a newsletter, or saving a workspace.
Local when possible
Formatters, generators, encoders, and text utilities generally run in your browser. Network diagnostics may need a server-assisted lookup to check public URLs, domains, or IPs.
Keep secrets out
Do not paste production passwords, private keys, access tokens, customer records, or regulated data into online tools unless your own security policy allows it.
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