How do I compress an image to 300 KB?

Drop the image onto the compressor above. 300 KB is already set as the target (you can switch to another size or a percentage), so click Compress and download the result.

Which image formats can I compress to 300 KB?

JPG, PNG, WebP, AVIF, GIF, HEIC and TIFF. Each file keeps its own format. SVG is compressed losslessly, so it can't be aimed at a size.

Which format keeps the most quality at 300 KB?

WebP, HEIC and AVIF keep more detail than JPG at the same size, roughly 1,900 × 1,260 px (2 MP) for WebP against 1,660 × 1,110 px for JPG. But forms usually ask for JPG, so check what the site accepts. PNG is the worst choice for photos at small sizes.

Will my image be resized to fit 300 KB?

300 KB leaves room for a detailed photo at typical laptop-screen widths. At 300 KB, a detailed photo comes out around 1,660 × 1,110 px as a JPG, or 1,900 × 1,260 px (2 MP) as a WebP. Each file keeps its own format.

What if my image won't fit in 300 KB?

Crop before you compress: every pixel you crop away is budget the subject keeps. For an ID photo, crop to head and shoulders first; for a document, crop to the page. Photo saved as PNG? Make it a JPG: at 300 KB, a photo stored as PNG only fits around 850 × 570 px; as a JPG it fits around 1,660 × 1,110 px. Form won't take HEIC?: iPhone photos are HEIC by default, and many upload forms reject it. Convert to JPG first, then compress to 300 KB.

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.

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.

Are my images uploaded?

Everything except HEIC is compressed in your browser, so nothing is uploaded; HEIC runs in an isolated cloud sandbox and is deleted automatically.

JPG→smaller JPG→PNG PNG→smaller JPG→WebP WebP→smaller JPG→JPEG HEIC→smaller JPG→PDF GIF→smaller JPG→GIF SVG→smaller JPG→AVIF AVIF→smaller JPG→SVG TIFF→smaller JPG→ICO MP4→smaller JPG→TIFF MP3→smaller JPG→BMP PDF→smaller JPG→PSD DOCX→smaller JPG→EPS MOV→smaller JPG→JXL JPG→TGA M4A→smaller JPG→DDS JPG→EXR WebM→smaller JPG→HDR JPG→JP2 MKV→smaller JPG→CUR JPG→PPM XLSX→smaller JPG→QOI JPG→PCX EPUB→smaller JPG→PGM JPG→PBM AVI→smaller PNG→JPG PNG→WebP FLAC→smaller PNG→JPEG PNG→PDF PPTX→smaller PNG→GIF PNG→AVIF AAC→smaller PNG→SVG PNG→ICO ZIP→smaller PNG→TIFF PNG→BMP OGG→smaller PNG→PSD PNG→EPS Opus→smaller PNG→JXL PNG→TGA 7Z→smaller PNG→DDS PNG→EXR ODT→smaller PNG→HDR PNG→JP2 TAR.GZ→smaller PNG→CUR PNG→PPM ODS→smaller PNG→QOI PNG→PCX ODP→smaller PNG→PGM PNG→PBM TAR.BZ2→smaller WebP→PNG WebP→JPG TAR.XZ→smaller WebP→JPEG WebP→PDF WebP→GIF WebP→AVIF WebP→SVG WebP→ICO WebP→TIFF WebP→BMP WebP→PSD WebP→EPS WebP→JXL WebP→TGA WebP→DDS WebP→EXR WebP→HDR WebP→JP2 WebP→CUR WebP→PPM WebP→QOI WebP→PCX WebP→PGM WebP→PBM AVIF→PNG AVIF→JPG AVIF→WebP AVIF→JPEG AVIF→PDF AVIF→GIF AVIF→ICO AVIF→TIFF AVIF→BMP AVIF→PSD AVIF→EPS AVIF→JXL AVIF→TGA AVIF→DDS AVIF→EXR AVIF→HDR AVIF→JP2 AVIF→CUR AVIF→PPM AVIF→QOI AVIF→PCX AVIF→PGM AVIF→PBM AVIF→PNM GIF→PNG GIF→JPG GIF→WebP GIF→MP4 GIF→JPEG GIF→PDF GIF→MOV GIF→AVIF GIF→SVG GIF→WebM GIF→MKV GIF→ICO GIF→AVI GIF→TIFF GIF→BMP GIF→WMV GIF→PSD GIF→FLV GIF→M4V GIF→MPEG GIF→3GP GIF→EPS GIF→MPG GIF→TS HEIC→PNG HEIC→JPG HEIC→WebP HEIC→JPEG HEIC→PDF HEIC→GIF HEIC→AVIF HEIC→ICO

Compress image to 300 KB

Shrink any photo or image to 300 KB or less for large web images that still load fast. JPG, PNG, WebP and HEIC and more. Free, and most never leave your browser.

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

JPG
PNG
WebP
AVIF
GIF
HEIC
TIFF

How to compress an image to 300 KB

1
Add your images
Drop JPG, PNG, WebP or HEIC files onto the compressor above, paste them, or click to browse. Mixed formats are fine.
2
300 KB is preset
Every file is compressed to land at or just under 300 KB. You can switch to another size, or a percentage to reduce by.
3
Compress
Click Compress. Each image keeps its format and, for most formats, never leaves your browser.
4
Check and download
Check the new sizes, then download each file or all of them as a ZIP.

Which format keeps the most at 300 KB

The same 300 KB holds a different amount of detail depending on the format. Rough size of a detailed 3:2 photo at good quality:

Format	A photo fits roughly	Good to know
JPG	≈ 1,660 × 1,110 px	Accepted almost everywhere; the safe pick for forms
WebP	≈ 1,900 × 1,260 px (2 MP)	More detail than JPG, if the site accepts WebP
HEIC	≈ 2,060 × 1,370 px (3 MP)	iPhone photos; many forms don't accept it
AVIF	≈ 2,120 × 1,410 px (3 MP)	Most efficient, least widely accepted
PNG	≈ 850 × 570 px	Best for logos, screenshots and signatures, not photos

Rough guide for detailed photos. Each file keeps its own format; convert first if the destination needs a specific one.

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.

Photo won't fit in 300 KB?

Crop before you compress
Every pixel you crop away is budget the subject keeps. For an ID photo, crop to head and shoulders first; for a document, crop to the page.
Photo saved as PNG? Make it a JPG
At 300 KB, a photo stored as PNG only fits around 850 × 570 px; as a JPG it fits around 1,660 × 1,110 px.
Convert PNG to JPG →
Form won't take HEIC?
iPhone photos are HEIC by default, and many upload forms reject it. Convert to JPG first, then compress to 300 KB.
Convert HEIC to JPG →

Other image sizes

300 KB for a specific format

Tips and numbers for one format at 300 KB.

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