tool · one of 51 Pro saves the result
Image lab
How do I shrink this image without uploading it anywhere?
Every image optimiser worth using is a website you upload the file to. This one re-encodes it in the panel, on your own machine: pick a width and a format, move the quality, and the result is redrawn as the controls move, laid over the original under a divider so the loss is judged by eye. Going through a canvas drops every byte of metadata - EXIF, location, colour profile - which is the second reason to use it.
Reach it Press ⌘ + K on any tab and type image lab. Ctrl + K on Windows and Linux
in the panel · this one is Pro
What this actually is
resize, convert and compress an image without it leaving the panelBefore a hero photo goes into a repository at four megabytes, when a screenshot needs to be a WebP, or when a picture from a phone still carries the place it was taken. The dominant colours come out of the same image, ready to copy into a palette.
Asked about this tool
3 of themIs the image uploaded to be compressed?
No. It is decoded and re-encoded by the browser in the panel, and nothing is requested. The file never leaves the machine it was on.
Why is AVIF not offered?
No browser this extension runs in can write AVIF from a canvas. A format button that quietly produced a PNG instead would be the wrong kind of convenience.
Does it remove location data from photos?
Yes. Re-encoding through a canvas keeps the pixels and nothing else, so EXIF, GPS coordinates and the embedded colour profile are all gone from the result.
how to use image lab
- Open Image lab and choose a file from this machine.
- Set the format, the quality and the largest width it may be.
- Drag the divider to compare the original and the result at the same size.
- Read the new file size and the six dominant colours, then save the image.
96 of these · no host permissions · three free audits