Compress Image to 100KB Online
100 KB is the most commonly requested upload limit on the web: job portals, visa and exam forms, CMS uploads and lightweight web pages all tend to land on it. Most phone photos start at 2–6 MB, so reaching 100 KB means a reduction of well over 95%. That is achievable on almost any photograph without it looking obviously damaged, especially if you keep the dimensions sensible. The target below is already set to 100 KB and you can change it at any time.
Processed in your browser
Drop your image here
or choose an image from your device
Accepts JPG, PNG or WEBP · No fixed size limit — we adapt to what your device can handle. Very large files may take longer or show a warning.
Need a different file size?
When you need this
- Uploading a photo to a job application or exam portal capped at 100 KB
- Keeping blog and product images light enough not to slow a page down
- Sending several photos in one message without hitting an attachment limit
How to use it
- 1Drop your JPG, PNG or WEBP image into the upload area, or tap it to pick a file from your device.
- 2The target size is already set to 100 KB. Change it in the target field if the form you're filling in asks for something different.
- 3Press the button and let the encoder step the quality down until the measured file is at or under the target.
- 4Check the Original, Result and Saved figures, then press Download to save the file.
Frequently asked questions
Will the file be exactly 100 KB?
No — 100 KB is a target, not a guarantee. The tool re-encodes your image repeatedly at lower quality until the measured output is at or below 100 KB, then stops. The number you see in the result panel is the real byte count of the file you download, so you can always confirm it before uploading anywhere.
What happens if my image can't reach the target?
If a very large or very detailed photo can't reach 100 KB at a reasonable quality, you'll get the smallest file the encoder could produce along with a note explaining it. Reducing the pixel dimensions first is the fastest fix: halving width and height removes about three quarters of the pixels and usually drops the file far below the target.
Is my image uploaded to a server?
No. Everything runs in your browser using the Canvas API. The file never leaves your device, there is no account to create, and nothing is stored after you close the tab.
Is there a watermark or a limit on how many images I can do?
There is no watermark and no daily limit. Because processing is local, the only real constraint is your device's memory, which the tool checks before it starts.
Should I use JPG or WEBP for a 100 KB target?
If the form only accepts JPG, keep JPG. If you're publishing to the web and the destination accepts WEBP, WEBP typically reaches the same visual quality in a noticeably smaller file, so you get more detail inside the same 100 KB.
Related guides
- How to compress an image to 100KB (without it looking terrible)100 KB is the most common upload limit on the web. Here is what actually gets you there, in what order, and where the quality really goes.
- How to reduce image file size without wrecking the pictureMost oversized images are oversized for one boring reason: the dimensions are far larger than anywhere they're displayed. Fix that first, then compress.
Related tools
- Image CompressorReduce JPG, PNG or WEBP file size with a quality slider you control. Compression happens in your browser.
- Resize ImageSet exact pixel dimensions or aim for a target file size in KB. Everything runs in your browser.
- JPG CompressorShrink JPG photos with a real quality slider and see the exact bytes you saved.
- PNG CompressorRe-encode PNG files, or switch to WebP or JPG when lossless PNG can't get any smaller.