Ori PicCompress image to 300 KB
The target is already set to 300 KB. Add your photos and press Compress to get files of 300,000 bytes or less. iPhone HEIC photos work too, and nothing is uploaded.
Choose images
Drop your images here
Up to 20 images · 20 MB each · JPG, PNG, WebP, HEIC
JPG replaces transparency with white. Compression may change individual pixels. Only the first frame of animated images is processed.
Choose images to see your file list and results here.
How to compress an image to 300 KB
- Drop your photos or press Choose images (up to 20).
- Check that the target is 300. Turn on exact dimensions if a pixel size is required.
- Press Compress images, check that the byte count is 300,000 or less, then save.
When 300 KB is used
Marketplace listings and community posts. Check the upload limit on the site you are using and pick the matching size.
Real photos compressed to 300 KB
Two 3,840×2,160 px landscape photos, automatic resizing, 4,000 px long-edge limit.
| Target | Photo A | Photo B |
|---|---|---|
| 100 KB | 1,269×714 px | 1,152×648 px |
| 200 KB | 2,111×1,188 px | 1,917×1,078 px |
| 300 KB | 2,586×1,454 px | 2,348×1,321 px |
| 500 KB | 3,264×1,836 px | 3,031×1,705 px |
| 1 MB | 3,840×2,160 px | 3,840×2,160 px |
Other sizes
- Compress to 20 KBSignatures, stamps and tiny profile slots
- Compress to 30 KBSmall ID and profile photos
- Compress to 50 KBJob applications and exam registration photos
- Compress to 100 KBOnline application forms and school uploads
- Compress to 200 KBForums, community boards and intranet uploads
- Compress to 300 KBMarketplace listings and community posts
- Compress to 500 KBOnline store, blog and email photos
- Compress to 1 MBHigh-quality photos for chat and email
Frequently asked questions
How many bytes is 300 KB?
This tool counts 300 KB as 300,000 bytes (0.3 MB). Sites that use 1 KB = 1,024 bytes allow 307,200 bytes, so a file made here always fits.
How large will my photo be at 300 KB?
Two 3,840×2,160 px photos came out at 2,586×1,454 px and 2,348×1,321 px. Simple backgrounds keep more pixels.
Will the image look bad at 300 KB?
Automatic resizing keeps JPG quality at 60% or higher and lowers the dimensions instead, so you get a smaller but clean photo rather than blocky artifacts.
Does it work on a phone?
Yes. Open this page in your phone browser and pick photos from your gallery. iPhone HEIC photos are converted to JPG.