Private by construction
There is no upload step, because there is no receiving server. Compression, resizing and conversion all happen on your device. Close the tab and nothing remains.
No uploads · no cookies
Compress JPEG images online — and keep them sharp.
Free, unlimited, private. Reduce the size of JPG files up to 80% in your browser with the MozJPEG engine — with metadata that never travels anywhere.Need a specific limit? Jump100 KB ·50 KB ·20 KB.
- Nothing uploaded
- No account
- Free forever
A JPEG compressor that keeps the sharpness — and your privacy.
Everything a browser needs to shrink photos: an industrial-strength encoder, exact size targets, batch runs and honest reporting — with no upload step anywhere in the pipeline.
MozJPEG, not the usual copy
The same encoder used across the industry’s best pipelines — trellis-quantized, optimized and progressive. It finds bytes other tools leave behind.
Say a size, get that size
Need under 200 KB for an ID portal or forum? Choose Target size and we search out the best quality that fits. When it is impossible, we say so honestly.
Batch, compare, keep
Process up to 50 files, peek at the before/after slider per image, strip or keep EXIF, and save each file or one tidy ZIP.
Shrink dimensions too
Set a maximum width or height — a 6000 px phone shot becomes a 1920 px web asset in the same pass. Ratios are always preserved.
Free, and ad-free
No “PRO” upsells, no watermarks, no waiting rooms, and no ads churning through your photos while you work.
Know exactly what you saved.
Every file reports its own numbers, and the batch shows a running total. No guessing whether that smile came out blurry — slide the compare view and check for yourself, per image.
- Per-image before/after sizes and savings badge
- Side-by-side original vs. compressed slider
- One ZIP when happy, individual files when picky
Compressing takes about a minute.
- 01
Add your images
Drag files into the drop zone, paste from the clipboard, or click to pick from your device. Up to 50 images at once.
- 02
Pick quality or a size target
Use the quality slider (75 is great for the web) or switch to Target size and enter a maximum in KB, e.g. 200.
- 03
Run and save
Press Compress. Compare original and compressed side by side, then save individually or download everything as a ZIP.
How much can you shrink a photo?
It depends on resolution and what the picture contains — busy forests fight back more than clean skies. As a working reference for phone-camera shots, camera exports and web graphics:
| Quality level | Typical saving | Good for |
|---|---|---|
| 85–95 | 30–50% | Keeping masters — retouching archives, hero hero images where detail sells |
| 70–84 | 60–75% | Web pages, product shots, newsletters — the everyday sweet spot |
| 50–69 | 75–85% | Thumbnails, catalogue previews, messaging apps |
| Below 50 | 85%+ | Desperate only — visible artifacts, blocks, and color fringing |
Aim smaller than you think
A crisp 1600 px wide image around quality 80 usually lands between 100–350 KB. Shared through chat, mailed, or hosted — nobody ever misses the 3 MB original. If you need an exact ceiling, the Target size button in the editor does the searching for you — or start from a preset: compress JPEG to 100 KB, 50 KB, 20 KB or 200 KB.
Why files get so large in the first place
JPEG already compresses — modern phones simply capture enormous resolutions that waste that compression. Two levers exist: how aggressively you encode (quality) and how many pixels you keep (resize). Our tool applies both in a single pass, and stacking them is where the dramatic savings hide.
Questions, answered plainly.
Are my images uploaded to a server?
No. CompressJPEG runs entirely inside your browser using WebAssembly. Your files never leave your device — you can even try it with airplane mode on after the page loads.
What does “compressing” do to my photo?
JPEG compression keeps the pixels, but re-writes them more efficiently. Some data the eye rarely notices is discarded. At quality 75–85 the change is essentially invisible for most photos, and files often shrink 60–80%.
Can I compress a JPEG without losing quality?
JPEG is lossy by definition — but “losing quality” only matters when you can see it. Encoded at 80 or above with the trellis-optimized MozJPEG engine, a compressed copy passes a side-by-side check against the original for most photos, and the built-in before/after slider lets you prove it to yourself before saving. If a file must stay mathematically identical byte for byte, ZIP the original instead — no image compressor can beat that.
Is this a JPEG size reducer or a photo resizer?
Both, in one pass. The quality setting decides how many bytes the file weighs — the actual size reduction. The maximum width/height decides how many pixels are kept — the dimension reduction. Together (1600 px at quality 80, say) a typical phone photo drops from several megabytes to a couple of hundred KB.
Is the original file changed?
Never. The compressed copy is saved as a new file with “.min” added to the name, and your original stays untouched wherever you keep it.
Do you remove photo metadata (EXIF)?
By default, yes — camera model, dates, GPS coordinates and color profiles are dropped in the compressed copy, which is a privacy win. If you need them, flip on “Keep EXIF & color profile” under advanced settings.
Can I compress for a specific file size, like under 200 KB?
Yes. Switch from “Quality” to “Target size”, type the limit in KB, and we search for the best encoding that fits. If the target is impossible at the current dimensions, we tell you instead of lying about it.
Which formats and files does it accept?
JPG/JPEG, PNG, WebP, GIF, AVIF and BMP in — compressed JPEG out (that is what the .in domain names). The Convert tool additionally outputs WebP, JPEG, or lossless PNG.
Why does the page ask for nothing — no signup, no cookies?
There is no account, because there is no server. We cannot track what you compress, because we never receive it. That is the whole model.
Ready to slim those files down?
Open the editor, drop your photos in, and see the numbers for yourself — risk-free, cost-free, trace-free.
Compress images now