Compress Image to Exact KB (20KB, 50KB, 100KB)
Compress or resize any photo to an exact 20KB, 50KB, 100KB or 200KB.
Need to compress an image to 20KB, or resize an image to 100KB for an online form? Toolzo compresses and resizes any JPG, PNG or WebP to an exact target — 15KB, 20KB, 40KB, 50KB, 100KB or 200KB — right in your browser. It doubles as a photo resizer, image compressor and JPEG compressor, and is the easiest way to reduce photo size in KB on mobile or iPhone without losing more quality than necessary. Batch-compress many photos to the same size at once.
How it works
- Add one or many images (drag, tap or browse).
- Choose a target size, or type a custom KB value.
- Press Process.
- Download a single file, or all of them as a ZIP.
Frequently asked questions
How do I reduce a photo to an exact KB?
Pick a target (20KB, 50KB, 100KB…) or type a custom value; the tool binary-searches JPEG quality and downscales if needed to land at or just under your target.
How do I reduce image size on mobile or iPhone?
Just open this page in your phone's browser, add the photo and choose a target KB — no app needed, and nothing is uploaded.
Can I compress many photos at once?
Yes — add up to 20 images and download them all compressed as a ZIP.
Does it work on mobile (Android & iPhone)?
Yes — it runs in any modern mobile browser, no app to install, and works the same on Android and iPhone.
Is it safe and private?
Yes. Your file is processed in your browser and never uploaded to any server, so nothing is stored or shared.
Do I need to sign up or pay?
No — it's completely free, with no signup, no watermark and no limits.
How to check a file's size
- Windows: right-click the file → Properties → see Size (and "Size on disk").
- Mac: click the file and press Cmd + I (Get Info) → see Size.
- Android: open Files / Gallery → long-press the image → Details / Info.
- iPhone: open the Files app → long-press the file → Info.
1 MB = 1024 KB. If a form asks for a photo "under 50 KB", it means 50 kilobytes — use the tool above to hit that exact size.