Compress ImagesRight in Your Browser
Shrink photos and images for email, websites and uploads — without sending them to anyone's server. Pick a quality level, optionally cap the dimensions, and compress a whole batch at once.
Updated January 2026
Drag & drop files here
or click to browse
Your files never leave your device
Choose settings and click Compress
1. Add your files
Drag & drop or click to browse. Multiple files supported.
2. Pick your settings
Choose the output format or compression level.
3. Download
Files convert on your device and download instantly.
About the format
Image compression shrinks files two ways: lossless coding removes statistical redundancy, while lossy coding also discards detail the eye is least likely to notice.
- JPEG (1992) exploits the eye's lower sensitivity to fine color detail than to brightness — chroma subsampling alone removes half or more of the color data invisibly.
- At typical quality settings, JPEG compresses photographs to roughly a tenth of their uncompressed size with little visible degradation.
- PNG's compression (the DEFLATE algorithm, RFC 1951, published 1996) is lossless — which is precisely why photos saved as PNG stay stubbornly large.
About this conversion
Images are usually the heaviest thing on a page, in an email or in a form submission, and most of them are carrying weight nobody will ever see. Cameras save JPEGs near maximum quality; screenshots ship as lossless PNG; exports default to "best." Perceptual compression exploits the gap between what's stored and what eyes notice — typically cutting photos by 60-90% with no visible difference at normal viewing sizes.
This compressor takes a batch of JPG, PNG or WEBP images, lets you pick a quality level (and optionally cap the longest side, which is where the biggest savings hide), and re-encodes everything on your device. A before/after size readout shows what you saved, and a guarantee applies throughout: if the compressed version isn't smaller than your original, you get the original back untouched.
The quality trade-off is real but asymmetric: the first 70-80% of savings is usually invisible, and it's only aggressive settings that produce visible softness or blocking. Use Balanced for anything meant to be looked at; use Smallest when the constraint is hard (a form's 2 MB limit) and the image is documentation rather than art. Photos with fine texture — hair, foliage, fabric — show artifacts soonest, so preview those before committing to the lowest setting.
When not to compress: archival originals, images headed for print, or anything you'll edit further — recompressing a compressed image compounds the loss. Compress the copies you ship, keep the masters. And since everything runs in your browser, even a sensitive screenshot full of account numbers never touches a server.
Frequently Asked Questions
How much smaller will my images get?
Photos typically shrink 60-90% at the balanced setting with no visible quality loss. Screenshots and graphics compress less; adding a dimension cap helps most there.
Will my images ever get bigger?
No — if a compressed version isn't smaller than your original, you get the original back unchanged.
Is it safe to convert photos online?
Yes. Unlike traditional online converters, this tool never uploads your files. The conversion runs entirely inside your browser using WebAssembly, so photos never leave your device — you can even disconnect from the internet after the page loads and it still works.
Every conversion runs 100% in your browser — zero files uploaded, ever.
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Who we are — and what we refuse to do
We're a small team that got tired of "free" converters treating your files as the product.
So we built Converting Free the only way we'd trust ourselves: the whole toolbox — image, document and archive converters, compressors, time-zone and unit tools, calculators and text utilities — does its work on your device. Open your browser's network tab while you convert something; you'll watch nothing leave.
We don't run ads, we don't set tracking cookies, and we don't operate a server that stores files. That isn't a privacy-policy promise — it's how the site is engineered. There is simply nowhere for your data to go.
Why we built it
Search for "convert X to Y" and the top results usually want something from you before they'll lift a finger:
- —Your file, uploaded to a server you know nothing about
- —Your patience, spent on queues, captchas and "premium speed" upsells
- —Your data, harvested by the trackers stacked beneath the ads
We think a converter should be a tool, not a trade.
Ours takes nothing from you: no uploads, no accounts, no tracking.