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Reduce Photo Size in KB on Mobile
Works in your phone browser. Pick a photo, type the KB and download. No app needed.
Advanced (optional): exact pixels or minimum KB
Many forms ask for pixels as well as KB. Leave empty if yours does not. Examples are common sizes only – always use the size your form states.
✅ Done! Your images are ready
About this tool
You do not need an app to cut a photo down to 20KB, 50KB or 100KB. Open this page in Chrome, Safari or any mobile browser, choose a picture from your gallery or camera, type the size and download the result.
How to use the photo size reducer for mobile tool
- Select your image. JPG, PNG, WebP and iPhone HEIC all work, and you can pick several at once.
- Check the size. The box is already set to 50. Change the number if your form says something different.
- Press the green button and download a JPG under 50 KB, or one ZIP for many files.
Compress mode keeps the best quality that still fits under your limit.
Where this helps
Form uploads from your phone
Take a photo, resize, upload, all in the browser.
Saving phone storage
Shrink big photos before sending or backing up.
WhatsApp and email
Smaller photos send faster on mobile data.
No app install
Nothing to download and no account to create.
What to expect
Processing happens on your phone, so very large photos (over 20MB) or older phones may take a few seconds longer. Keep the screen on until the green Done message appears.
Frequently asked questions
How do I resize a photo in KB on Android?
Open this page in Chrome, tap Select Images, pick the photo, type the KB you need and tap the green button. The result goes to your Downloads folder.
How do I do it on iPhone?
Open the page in Safari, choose the photo from your library, set the KB and tap the green button. Tap Download and choose Save to Files or Photos.
Will this use a lot of mobile data?
No. The photo is not uploaded. Only the page itself loads, which is small.
Is my photo uploaded anywhere?
No. Everything happens inside your browser, so your picture never leaves your device. No signup, no watermark.
Other sizes and tools
Compress image to a smaller size
Increase image size to a larger size
Signature, passport photo, formats and more
Prefer a percentage instead of a KB size? Use the quality-based image compressor, or read our image guides.