Compress image to 300 KB
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Settings
A roomy limit: most photos fit under 300 KB with barely visible changes.
At 300 KB you are not fighting for every byte; the question is mostly how much resolution to keep. A phone photo shrinks to this size with a lower quality setting and, for detailed scenes, a moderate resize. Drop photos, screenshots or scans; the page finds the best quality that fits under 300,000 bytes for each one and tells you exactly what it did. All processing stays on your device.
How to compress an image to 300 KB
- Drop your images; mixed formats are fine, HEIC included.
- Keep the 300 KB target (or set your exact limit).
- Compress, glance at the quality and size in the report, and download the JPGs or a ZIP.
What happens to quality, size and metadata
With this budget, many photos keep their full camera resolution at a quality in the 60s to 80s; very detailed 48 MP shots may be scaled down. Because the search tries quality first, you won’t get a small image when a slightly lower quality would have done.
The file is always 300,000 bytes or less, so it passes both the 1,000-byte and 1,024-byte way of counting kilobytes. The output is JPG with the date taken kept and GPS removed by default.
Where 300 KB is asked for
This size shows up as the upper photo or signature limit on some Indian exam and commission portals, which accept anything from about 20 KB to 300 KB. It is also common for scanned certificates and ID proofs in admission and recruitment systems, for profile photos on job and freelancing platforms, and for document uploads on banking and insurance KYC forms. Some school and hostel applications abroad use it too. As always, the notice may add pixel or background rules.
Tips for clear photos at small sizes
- Good light matters more than megapixels: a well-lit photo compresses cleaner than a dim, noisy one.
- Turn off portrait blur and filters; heavy effects create detail the encoder has to spend bytes on.
- For a scan, use your phone’s document scanner (in Notes on iPhone or the Drive app on Android) to get a flat, white page first.
Troubleshooting
- The result is still several thousand pixels wide. That is fine when it fits; if the form also limits pixels, resize first.
- Screenshots look slightly soft. JPG isn’t ideal for text-heavy screenshots; crop to the relevant part.
- Batch of mixed photos. Each file gets its own search, so the qualities will differ. That is expected.
- Need a PDF instead. Use the JPG to PDF 300 KB page.
Questions and answers
How do I make a photo smaller than 300 KB?
Drop it on this page and press Compress; the target is already 300 KB. The photo is re-encoded at the highest JPG quality that fits, and scaled down only if needed. The report shows quality, dimensions and the exact byte count.
Will a 300 KB photo look good?
Yes, for screens and most forms. 300 KB is enough for a sharp portrait or a detailed photo at a sensible resolution, and most people won’t spot a difference from the original on a phone or laptop. It isn’t enough for large prints, where you should send the original file instead.
Does it work with iPhone photos?
Yes. HEIC photos from an iPhone are decoded in your browser and saved as a JPG under 300 KB in one step, with no separate conversion. On Safari the decoding is built in; other browsers load a small HEIC decoder once, after which it works offline.