Image Compressor & Optimizer
Shrink a photo until it fits, with a live preview of the size you save at every quality level.
Free forever, no sign-up and no limits, and this tool installs on its own so you can keep it on your home screen.
Pick a photo, or up to 50 at once, drag the quality slider, and watch the file size fall, with before, after and savings shown live. Most photos shrink by 60–90% before any difference is visible. A batch comes back as one ZIP, with no watermark and no upgrade prompt.
How to use it
- Choose a picture, or fiftyTap the box or drop a whole folder in. Sizes appear immediately, and a batch shows a running count as it works through.
- Set the quality, or a size capDrag the slider, or switch to Get under a size and pick 100, 200, 500 or 1000 KB, the tool finds the best quality that fits. The setting applies to every picture you chose.
- DownloadOne photo saves with -optimized added to its name. A batch saves as a single ZIP, or one row at a time. Originals are untouched.
Where the megabytes go
A modern phone saves photos at 12 to 48 megapixels and 3–8 MB each, sized for printing posters, not for sending. Most of those bytes describe detail no screen will ever show. Compression keeps what eyes notice and discards what they do not, which is why a 4 MB photo routinely becomes 400 KB with no visible change.
The slider controls that trade directly, and the live readout shows the price of each step. There is no single right answer: a photo for a listing can afford 65%, a portfolio piece wants 90%. Seeing before and after means you decide with the numbers in front of you.
Compress, resize, or both?
Quality is only half the size equation, the other half is pixels. A 4000-pixel-wide photo shown in an 800-pixel spot is paying five times the bytes for nothing. The order that wins: resize down to the size the destination will actually display, then compress. Together they routinely take a photo from 5 MB to under 150 KB.
An honest optimizer
Some pictures are already as small as they usefully get: files that came through WhatsApp, images taken from a website, anything previously optimised. Re-encoding those makes them slightly worse and sometimes larger. When that happens this tool says so and suggests keeping the original, rather than delivering a "compressed" file that is a downgrade. An optimizer you cannot trust to say "no gain here" is just re-saving.
No queue, no watermark, and no limit on how many photos you put through it.
Questions people ask
How do I get a photo under 2 MB for an upload form?
Choose it here and read the After figure: at the default quality almost any phone photo lands well under 2 MB. If it is still too big, lower the slider. For enormous images, resizing the pixels first shrinks the file far more than quality alone.
How does the Get under a size option work?
Pick a cap of 100, 200, 500 or 1000 KB and the tool tries several quality levels in a handful of passes, homing in on the highest one whose file still fits. If even the lowest quality cannot reach the cap it says so plainly and reports the closest size it managed, rather than quietly handing you a file that misses the target. The fix then is fewer pixels, so resize first.
How much smaller will my photo get?
Typical phone photos compress by 60–90%, depending on how much smooth detail they hold and how hard the phone already compressed them. Screenshots and graphics are less predictable, and are often better served by PNG or by resizing.
Will people see the difference?
At 75–85% quality, almost never at normal viewing sizes. Artefacts appear first in flat gradients like skies and in fine texture like hair. If a picture will be studied closely or printed large, stay at 85% or above, the savings are still substantial.
Why did the tool say my file got bigger?
Because it was already tightly optimised, often a photo that has been through another compressor or a messaging app. Re-encoding cannot find savings that are not there, so the tool says so and recommends keeping the original.
Should I use the WebP option?
Leave it on Best and the tool decides from your own picture. Both formats are encoded and both sizes are printed, so you can see which actually won. WebP is often smaller than JPG at matching quality, but not always: on noisy photographs it sometimes comes out larger, which is why the claim is measured here rather than assumed. Pick JPG if the destination will not accept WebP.
Can I compress a whole folder of photos at once?
Yes, up to 50 at a time, and the quality or size cap applies to every one. They are handled one after another rather than all at once, which is what stops a phone running out of memory on a folder of large photos, and a running count shows how far along it is. Each row has its own save button, and Download all as a ZIP takes the finished set in one go.
Does compressing twice make a photo smaller still?
Not usefully, and it costs you quality. Every re-encode discards detail permanently, so a second pass over an already-compressed photo gives a slightly worse picture at roughly the same size. Go back to the original and pick a lower quality once instead.