How do I compress a PNG to 300 KB?

Drop the PNG onto the compressor above. The 300 KB target is already set, so just click Compress and download the result.

Will the file be exactly 300 KB?

It aims to land at or just under 300 KB. 300 KB here means 300,000 bytes, so it also fits sites that count 1 KB as 1,024 bytes.

How much quality will I lose at 300 KB?

300 KB leaves room for a detailed photo at typical laptop-screen widths. PNG keeps logos and screenshots crisp at 300 KB, but photos have to be scaled down a long way. For photos, converting PNG to JPG reaches 300 KB at a much higher resolution.

My PNG is already smaller than 300 KB. What now?

Then it already fits, and compressing it further would only cost quality. Upload it as it is, or pick a smaller target if you need it smaller still.

What if my PNG can't get down to 300 KB?

Very large or detailed images are scaled down further to reach 300 KB. If the result is too small, pick a larger target.

What is 300 KB typically needed for?

Common reasons: wide images in blog posts and landing pages; portfolio and gallery pages; upload forms with a 300 KB limit. Limits vary by site, so check the exact number where you're uploading.

Yes. It's compressed inside your browser and never uploaded.

PNG→smaller PNG→JPG JPG→smaller PNG→WebP MP4→smaller PNG→JPEG MP3→smaller PNG→PDF PDF→smaller PNG→GIF WebP→smaller PNG→AVIF HEIC→smaller PNG→SVG DOCX→smaller PNG→ICO GIF→smaller PNG→TIFF SVG→smaller PNG→BMP MOV→smaller PNG→PSD AVIF→smaller PNG→EPS M4A→smaller PNG→JXL PNG→TGA WebM→smaller PNG→DDS PNG→EXR MKV→smaller PNG→HDR PNG→JP2 XLSX→smaller PNG→CUR PNG→PPM EPUB→smaller PNG→QOI PNG→PCX AVI→smaller PNG→PGM PNG→PBM FLAC→smaller JPG→PNG JPG→WebP PPTX→smaller WebP→PNG WebP→JPG AAC→smaller HEIC→PNG HEIC→JPG ZIP→smaller MP4→MP3 JPG→JPEG TIFF→smaller JPEG→PNG JPEG→JPG OGG→smaller JPG→PDF PDF→PNG Opus→smaller PDF→JPG HEIC→WebP 7Z→smaller MP4→WebP PDF→DOCX ODT→smaller DOCX→PDF JPEG→WebP TAR.GZ→smaller WebP→JPEG JPG→GIF ODS→smaller GIF→PNG GIF→JPG ODP→smaller MP4→MOV MOV→MP4 TAR.BZ2→smaller WebP→PDF HEIC→JPEG TAR.XZ→smaller WebP→GIF GIF→WebP HEIC→PDF MP3→WAV WAV→MP3 JPEG→PDF PDF→JPEG SVG→PNG SVG→JPG HEIC→GIF MOV→MP3 MP4→GIF GIF→MP4 JPEG→GIF GIF→JPEG JPG→AVIF AVIF→PNG AVIF→JPG MP3→M4A M4A→MP3 GIF→PDF SVG→PDF JPG→SVG PDF→SVG SVG→WebP MOV→WebP MP4→WAV MP4→WebM WebM→MP4 WebP→AVIF AVIF→WebP WebP→SVG SVG→JPEG MP4→MKV MKV→MP4 HEIC→AVIF MP4→M4A JPEG→AVIF AVIF→JPEG JPEG→SVG MOV→GIF GIF→MOV WebM→MP3 AVIF→PDF MP3→FLAC FLAC→MP3 MP4→AVI AVI→MP4 MKV→MP3 GIF→AVIF AVIF→GIF SVG→GIF GIF→SVG WebM→WebP MOV→WAV XLSX→PDF CSV→PDF EPUB→PDF PDF→EPUB MOV→WebM WebM→MOV MKV→WebP JPG→ICO ICO→PNG ICO→JPG MP3→AAC WAV→M4A AAC→MP3 M4A→WAV MP4→FLAC AVI→MP3 MOV→MKV MKV→MOV MOV→M4A DOCX→EPUB EPUB→DOCX CSV→DOCX PDF→TXT

Compress PNG to 300 KB

Shrink a PNG to 300 KB or less for large web images that still load fast. Free, and nothing is uploaded.

Runs in your browser
Same format, smaller file
Batch & ZIP download

How to compress a PNG to 300 KB

1
Add your PNG
Drop one or more PNG files onto the compressor above, paste them, or click to browse.
2
300 KB is preset
The target is already set to 300 KB, and each file is compressed to land at or just under it. You can switch to another size or a percentage to reduce by.
3
Compress
Click Compress. The PNG is processed in your browser; nothing is uploaded.
4
Check and download
Check the new size, then download each file or all of them as a ZIP.

What fits in 300 KB

PNG is lossless at heart, so what fits in 300 KB depends heavily on the content.

Content	Roughly fits	Notes
Logo or flat graphic	≈ 2,000 × 2,000 px (4 MP)	Few colours compress very well
Screenshot	≈ 1,550 × 970 px	After palette reduction
Photo	≈ 850 × 570 px	Convert to JPG for far more

Rough guide for square, 16:10 and 3:2 images. Real results depend on detail and colour count.

What 300 KB is typically for

Wide images in blog posts and landing pages
Portfolio and gallery pages
Upload forms with a 300 KB limit

Limits vary by site and change over time; check the exact number where you're uploading.

How PNG gets smaller

Reduces the colour palette (lossy levels) and re-compresses at maximum zlib effort.

Compress PNG by quality level instead →

Neighbouring sizes

Or compress PNG by level and set any size or percentage yourself.

Got a mix of formats? Compress any image to 300 KB.

Compress other images

All images →

PNG to 300 KB: frequently asked questions

Free, private and in your browser

PNG to 300 KB, done.

Drop the file, keep the preset, download the result. No sign-up, no watermark.

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Most conversions never leave your device
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