Resize, crop, rotate, compress and convert your photos — free, without an account, and without installing an editor just to change one dimension.
Small edits that shouldn't need Photoshop
Most image jobs are not really editing. An upload form rejects anything over two megabytes. A CMS wants exactly 1200 pixels wide. A screenshot needs the one dialog in the middle and none of the desktop around it. None of that warrants launching a full editor, and none of it should cost a subscription.
slimdocs handles those jobs one at a time, with the specific control you came for and nothing else on screen. Compression is driven by real encoders — Sharp with MozJPEG for JPEG, and WebP or AVIF when you want the biggest possible saving — rather than a quality slider that quietly re-saves at random. Resizing uses a high-quality filter, so a photo scaled down stays crisp instead of turning soft.
Every image tool respects the original: EXIF orientation is applied so a phone photo is never sideways, nothing is enlarged unless you ask for it, transparency is preserved whenever the target format supports it, and the result is never handed back larger than what you started with.
Frequently asked questions
Which image formats can I use?
JPEG, PNG, WebP, AVIF, GIF and TIFF are supported for input, and you can convert between JPEG, PNG, WebP and AVIF on output. HEIC support is being added.
How much smaller will my photo get?
Typically 70–85% for a JPEG at the Balanced level, and 95%+ if you convert to AVIF. Photographs and screenshots compress heavily because they usually carry far more detail than any screen can show.
Will compression ruin the quality?
Not at the Light and Balanced levels — those are chosen to be visually indistinguishable at normal viewing size. Maximum and Extreme trade visible sharpness for a much smaller file, and are there for hard upload limits.
Does resizing lose quality?
Scaling down does not; a smaller image simply carries less detail than it did before, and the filter keeps edges clean. Scaling up cannot invent detail that was never captured, so enlarging is switched off unless you turn it on.
Why is my photo sideways in some apps?
Phones record orientation as metadata rather than rotating the pixels, and not every program reads it. The Rotate Image tool bakes the correct orientation into the pixels themselves, which fixes it everywhere.
Are my photos uploaded anywhere permanently?
No. Images are processed in memory and discarded as soon as your download is delivered. Nothing is stored, indexed or reused.