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Compress Image to 300KB
Enter 300 to keep detail while cutting the file well below camera size.
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 the 300KB image
300KB works well when you want an image that still looks great but is far lighter than a camera original, for example property photos, brochures and detailed product shots.
How to compress an image to 300KB
- 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 300. Change the number if your form says something different.
- Press the green button and download a JPG under 300 KB, or one ZIP for many files.
Compress mode keeps the best quality that still fits under your limit.
Where you need a 300KB image
E-commerce galleries
Product close-ups that show texture.
Presentation slides
Keep a deck from ballooning.
Social media posts
Under most upload limits while looking crisp.
Online portfolios
Show detail without slowing the page.
What to expect at 300KB
At 300KB most photos keep around 1600 to 2000 pixels on the long side with minimal visible loss.
300KB image FAQ
Is 300KB suitable for Instagram?
Instagram re-compresses uploads, so starting with a clean 300KB image around 1080 pixels wide gives good results.
Why not just choose 80% quality?
Percentage settings give unpredictable sizes. Typing 300 gives a predictable file size.
Can I go smaller later?
Yes, but always compress from the original again with a lower number such as 200. Re-compressing a result stacks up quality loss.
Is my photo uploaded when I compress it to 300 KB?
No. The 300 KB resizing runs 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
Need the opposite? Try Increase image size to 300KB.
Prefer a percentage instead of a KB size? Use the quality-based image compressor, or read our image guides.