100% in your browser. Nothing uploaded.
Convert and compress any image — right in your browser
No uploads. No signup. Your files never touch a server. Fast, private image tools.
See it work — no file needed
Two real examples, already processed on this page. Drag the handle to compare, or use the arrow keys.
Changes the format — PNG to WEBP
Same image. Smaller file. Nothing left your machine.
Try convert with your own imageKeeps the format — JPG stays JPG
Same format, same photo. Drag to spot the difference — most people can't.
Try compress with your own imageConvert changes the file type, usually shrinking it a lot at the same time. Compress keeps the file type you already have and trims the size.
You drop a file
It's read straight from your disk into this tab. No upload starts, because there's nowhere to upload to.
Your device does the work
Your browser decodes and rewrites the image across 11 supported formats, including AVIF.
You download the result
The file comes from memory on your own machine, then disappears the moment you press Clear.
No account, no cookie banner, no daily limit — there is no server keeping score.
Built for speed. Built for privacy.
Professional-grade control, without a single byte leaving your machine.
Instant
No upload, no download, no waiting. Results appear the second your device finishes.
Private by design
Your files are processed on your machine and sent nowhere. We couldn't see them if we wanted to.
Every format that matters
11 formats, from everyday web images to iPhone photos.
Actually compressed
Every file comes out optimized, not just re-saved at full weight.
Type a size. We find the quality.
Email caps, form uploads, CMS limits — tell Under1MB the number and it lands the highest-quality file that fits.
Works on any size in, any size out. The name is the job, not a limit.
Forty files. One drop. One ZIP.
Drop a folder of product shots, convert or compress the lot, download a single ZIP. No queue, no per-file limit, no waiting on a server.
Batch convertEvery format you actually need
11 formats today — everyday web images to iPhone and design files.
GIF converts from its first frame. SVG is rasterized at the size you choose.
Coming soon
TIFF · TGA · PSD · PSB · CR2 · CR3 · NEF · ARW · DNG · ORF · RAF · RW2 · XCF · ICNS · PUB
Some of these need heavier decoders, some need server-side processing. They're on the roadmap — and they'll still never require an account.
Popular tasks
One click loads the right tool with the right settings.
Your files never leave your device
This is the whole point of Under1MB — not a footnote in a policy page.
No uploads, ever
Everything runs on your browser's built-in image tools. Files are never sent.
Nothing to leak
There's no server holding your files, because none are ever sent. Nothing to store, nothing to breach.
Nothing to see
Under1MB has no way to know what you convert. By design, not by promise.
Most converters upload your image, process it on their servers, and promise to delete it. We just never receive it. That's a stronger position than any deletion policy — because there's nothing to delete.
Don't take our word for it
Privacy claims are cheap. This one takes 20 seconds to check.
- 1Press F12 (or ⌘ + ⌥ + I on a Mac) to open your browser's developer tools.
- 2Open the Network tab and clear the list.
- 3Drop an image into the tool and hit Convert.
- 4Watch the list stay empty. No upload. No request. No copy of your file, anywhere.
You'll see one small analytics ping on page load — never during processing, never with your file.
Runs on standard browser image APIs — nothing to install, no extension, no desktop app. Full support in Chrome, Safari (incl. iOS), Firefox, and Edge.
Free. Unlimited. No account.
No credit card, no meter running in the background, no plan to change that.
Free Forever
$0
- ·Unlimited conversions, compressions and resizes
- ·All 11 formats
- ·Batch with ZIP download
- ·No file-size caps beyond your browser's memory
- ·No account required
A paid Pro tier for teams and automation is planned. It will charge for automation — never for privacy. Join the waitlist →
What people use it for
Client handoffs, in seconds
Shrink 40 product shots before a handoff without a batch upload and a coffee break.
iPhone photos, anywhere
Turn HEIC into JPG right in the browser, so nothing sensitive touches a third-party server.
Lighter storefronts
Compress PNGs and cut page weight by two-thirds. No plugin, no subscription, no upload queue.
Three steps, either way
Convert
- 1Drop an imageAny of the 11 formats, one file or many.
- 2Pick a formatPNG, JPEG, WEBP, AVIF, BMP or ICO.
- 3DownloadAuto-compressed at a smart default quality.
Compress
- 1Drop an imageThe format locks to whatever you dropped in.
- 2Type a target size or drag the qualityThe output size updates as you go.
- 3DownloadSame format, smaller file.
Straight answers
What's the difference between Convert and Compress?+
Convert changes the file format (PNG to WEBP, HEIC to JPG). Compress keeps the same format and makes the file smaller. Convert also compresses automatically at a smart default.
Does Convert compress my image too?+
Yes. Every conversion is optimized at a sensible default quality, not just re-saved at full weight. Use Compress when you want to control the trade-off yourself.
Do my files get uploaded — ever?+
No. Everything happens in your browser. You can prove it: open your Network tab, convert a file, and watch nothing get sent.
Does Under1MB only work on files under 1 MB?+
No. The name is the job most people come here for — getting an image under a size limit. Files of any size go in, and you can target any output size.
Which formats are supported?+
11 today, across web, photo, and design files. TIFF, PSD and RAW are on the roadmap.
PNG, JPEG, WEBP, AVIF — which should I use?+
PNG for transparency and sharp graphics. JPEG for photos where small size matters. WEBP for the best all-round balance on the web. AVIF for the smallest files, if your users' browsers support it.
Is there a file-size or batch limit?+
Only your browser's memory. Batch as many as it can hold, and download them as a ZIP.
Is it really free, no account?+
Yes. Free forever, no signup, no card.
Your images. Your device. Your privacy.
Three tools, 11 formats, zero uploads. Start with a file you already have open.
Try Under1MB free