Optimize an Image
Re-encode an image at a sensible quality to shrink its file size. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Optimize an Image
- 1. Drop in an image. Add the photo or graphic you want to shrink for the web, in any common format. It is decoded fully before being re-encoded at your chosen settings.
- 2. Choose Output format and Quality. Pick WebP, JPEG or PNG for the output, then adjust the Quality slider to trade off visual fidelity against file size. WebP at moderate quality usually gives the smallest result.
- 3. Download the optimized image. Click generate and download the resulting file, typically much smaller than the original at a visual quality that still looks acceptable on screen.
When to use Optimize an Image
Optimize an Image re-encodes a picture at a sensible quality and in a chosen format to shrink its file size, combining format selection and quality control in one step. It is for anyone preparing images for faster loading without manually testing every format and quality level.
- Getting a slow-loading page under a performance budget. A page audit flags several oversized images, and re-encoding each one to WebP at a moderate quality setting brings total page weight down noticeably.
- Reducing bandwidth costs for hosted images. A site serving thousands of images pays for bandwidth, and optimizing each upload before storage cuts data transfer costs without a visible drop in quality.
- Preparing images for a mobile app bundle. An app's install size grows with every bundled image asset, and re-encoding them at a leaner quality and format keeps the app package smaller.
Examples
Shrink for the web
Input
photo.png + WebP + quality 82
Output
photo.webp, 68% smaller
About the Optimize an Image tool
Optimize an Image does its work locally, right in the browser. Re-encode an image at a sensible quality to shrink its file size. There is no upload step, no queue and no account, and your data never travels over the network.
It belongs to the Image Tools collection on EditSafely, a set of 200 small, focused Image utilities that share the same instant, private workspace.
You can shape the output with 2 settings, including Output format and Quality (%), and the result refreshes the moment you change one. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
Running locally also makes the tool fast and dependable: results appear as you type or drop a file, there is no server outage that can take it down mid-task, and confidential data can be processed without a second thought.
Frequently asked questions
Does Optimize an Image cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
Which files does Optimize an Image accept?
It accepts images in any common format (PNG, JPG, WebP, GIF and more). There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.