Drop your image
JPG, PNG, WebP or another common format. You can add several at once.
Compress image to 100 KB
Get any photo under 100 KB without guessing: set the limit, drop your image and the tool finds the highest quality that still fits. Nothing is uploaded.
- Free
- No sign-up
- Runs in your browser
Common limits
100% private — your images are processed on your device and are never uploaded to any server.
Works with images up to about 40 MB. On an older phone, very large files may be slow or run the browser out of memory.
Next step
Keep going with your result in another tool. Nothing is uploaded.
How it works
The limit is already set
The maximum size is 100 KB; change it or the output format if you need to.
Download the result
Each image is compressed on your device and downloaded at 100 KB or less.
How to compress an image to 100 KB
To compress an image to 100 KB, drop it on the box above: the limit is already set to 100 KB. The tool tries different quality levels and, if needed, smaller dimensions until the file fits, then gives you the best result under 100 KB. It all happens in your browser, so the image is never uploaded.
What 100 KB means for an image
100 KB is 100,000 bytes. For a typical photograph that is about 800 × 600 pixels at reasonable quality. Small, simple images (logos, signatures, flat graphics) fit in far less, while detailed photos with lots of texture need a lower resolution to reach the same limit.
Where a 100 KB limit is common
Files around 100 KB are typically asked for in profile pictures, form uploads, blog thumbnails and ID photos on portals. Portals set limits like this to keep uploads fast, so a result that is at or under the limit is what they accept.
How the tool reaches 100 KB
The tool first lowers the JPEG or WebP quality in small steps, because that costs the least visible detail. If the quality alone cannot get under the limit, it also reduces the image dimensions, and it tells you when a file cannot go below a certain size without ruining the picture. A bytes-per-pixel guide: at 0.5 bits per pixel a 100 KB file holds about 1.6 MP, at 1.0 about 0.8 MP and at 1.5 about 0.5 MP.
What fits in 100 KB (estimate)
| JPEG quality | Pixels that fit | Largest common size |
|---|---|---|
| Low (about 0.5 bits per pixel) | 1.60 MP | 1280 × 960 |
| Medium (about 1 bit per pixel) | 0.80 MP | 1024 × 768 |
| Good (about 1.5 bits per pixel) | 0.53 MP | 800 × 600 |
| High (about 2.5 bits per pixel) | 0.32 MP | 640 × 480 |
How much has to go
| Typical file | Reduction needed |
|---|---|
| Phone photo, 12 MP (about 3.5 MB) | 97% |
| High-resolution photo, 48 MP (about 12 MB) | 99% |
| Web photo, 2 MP (about 600 KB) | 83% |
| Full HD screenshot as PNG (about 400 KB) | 75% |
When you need 100 KB
A 100 KB limit is one of the most common: profile pictures, ID photos on portals, thumbnails in a content system and attachments in forms that accept a photo but not a large file. It is a comfortable size for a clear portrait or a small product picture.
What to give up first at 100 KB
You rarely have to sacrifice much at 100 KB. A phone photo reduced to around 800 pixels wide and a quality in the 60s or 70s usually lands under the limit and still looks sharp on screen. Only very detailed images, such as crowds or foliage, may need lower dimensions.
Tips to stay under 100 KB with the best quality
- Resize before you compress when the photo comes straight from a phone: 800 to 1,000 pixels on the long side is plenty.
- Portrait photos with a plain background reach 100 KB easily and keep good facial detail.
- Do not compress an already compressed copy; start again from the original for the best result.
- Start from the original, not from an already compressed copy: repeated compression degrades quality faster.
Private by design
The compression runs entirely in your browser. Your image is not uploaded, so documents, ID photos and personal pictures stay on your device, and there is no queue.
Frequently asked questions
How do I compress an image to 100 KB?
Drop the image on the tool at the top of this page. The limit is already set to 100 KB; the tool finds the best quality that fits and lets you download it.
How do I make a photo 100 KB?
Drop it in the tool above: the limit is preset to 100 KB, and it searches for the highest quality that fits, reducing the dimensions if needed.
Is 100 KB good enough for an ID photo?
For an on-screen upload, yes: a face at roughly 600 × 800 pixels is clear at this weight. Check the portal's own pixel requirements as well as the weight.
Will the result be exactly 100 KB?
It will be 100 KB or less. The tool picks the highest quality that fits under the limit, so the file often lands just below it, but it is not padded to an exact size.
Why can't my image go under 100 KB?
A very large or very detailed image may need to be reduced in dimensions as well as quality. Resize it to a smaller size first, or accept a lower resolution.
Does compressing to 100 KB reduce the resolution?
Only when necessary. The tool lowers quality first and reduces the dimensions only if the quality alone cannot reach the limit.
Is it free and private?
Yes. There is no sign-up or watermark, and the image never leaves your device because the compression runs in your browser.
Related tools
More utilities that also run without leaving your browser.
Meme generatorAdd classic top and bottom meme text to a photo and download it.
Merge screenshotsStack several screenshots into a single long image, in the order you choose.
Passport photo makerCrop a photo to an exact passport or ID size, with guides and a print sheet.
Compress images onlineMake photos lighter with a before-and-after view, one or many at once.
Convert images between JPG, PNG, WebP and AVIFConvert between JPG, PNG, WebP and AVIF, one file or many at once.
HEIC to JPG converterTurn iPhone photos into JPG or PNG that open anywhere, without uploading them.