Compress Image to 300KB
Instantly reduce your high-resolution marksheets, multi-page document scans, and premium web graphics down to exactly 300KB.
Upload Your Photos
Drag and drop here, or choose from your device
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Size Settings
We'll keep your image at or under this size, with the best quality possible.
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How to Compress an Image to 300 KB
300 KB is a great size for website and blog images: sharp on laptops and quick on phones. Upload your picture and get a copy under 300 KB in seconds.
Upload Your Image
Click the upload box and choose a JPG, PNG or WEBP image. You can pick several images at once.
Check the Target Size
The target is already set to 300 KB. Change it, or add a Max Width, if you need to.
Compress & Download
Click the compress button and download your image. Several images download together as one ZIP file.
Target
300 KB
Formats
JPG · PNG · WEBP
Format kept
JPG stays JPG
Batch
Many photos · ZIP
Price
100% free
Watermark
None
What 300 KB Means for Your Photo
300 KB is a great size for website and blog images: sharp on laptops and quick on phones.
Typical photo width
2,100–2,750 px
Smaller than a 3 MB phone photo
About 90%
Upload time on slow data (1 Mbps)
About 2 seconds
Numbers are a guide for a typical phone photo. Simple pictures stay bigger; very detailed photos come out a little smaller.
When Do You Need a 300 KB Image?
300 KB is best for website images, blogs, product photos and social media.
Social Media
Share good-quality photos that upload fast.
Property Listings
Detailed house and room photos for real-estate websites.
Portfolio Pages
Show your work clearly without slowing your portfolio down.
Banners & Headers
Wide header images for websites and newsletters.
What to Expect at 300 KB
How Will It Look?
At 300 KB images look sharp and detailed on phones and computers, with no visible loss for most photos.
Always Under 300 KB
The tool never goes over 300 KB. It picks the best quality that fits, keeps your format (JPG stays JPG), and tells you clearly if a picture can't get that small.
Tips for the Best Result at 300 KB
- Website images? WEBP files are smaller; convert with JPG to WebP.
- Already under 300 KB? Your original is kept as it is — no quality lost.
- One size for all? Upload a whole set of product photos to make them consistent.
- Keep the original. Save your full-size photo separately for printing later.
Choose the Right Image Size
Need a different limit? Pick a size — each page opens with that target already set.
Frequently Asked Questions
Quick answers about compressing an image to 300 KB.
Upload your photo, check that the target says 300 KB and click the compress button. Your smaller image is ready to download in a few seconds.
Yes, whenever possible. The tool never goes over 300 KB — it finds the best look that fits. If a picture can't get that small, you'll see a clear message and get the smallest version we could make.
At 300 KB images look sharp and detailed on phones and computers, with no visible loss for most photos.
This mostly happens with PNG files or very detailed pictures. Convert PNG to JPG first, crop the photo, or choose a slightly bigger target.
It depends on the photo, but as a guide a typical phone photo comes out about 2,100–2,750 px wide at 300 KB, with good quality. Simple pictures like signatures can stay wider; busy, detailed photos come out a little smaller.
300 KB gives about 20% more room than 250 KB, so photos come out a little wider (about 2,100–2,750 px instead of 1,950–2,500 px) and sharper. Always pick the biggest size your form or website allows — it gives the best quality.
Yes. When you pick a photo on iPhone it's usually turned into a JPG automatically. If you see an error, set Settings → Camera → Formats to Most Compatible and take the photo again.
Yes — 100% free, with no sign-up, no watermark and no app to install.
Not quite. Compressing makes the file smaller (KB/MB). Resizing changes the width and height in pixels. This tool does both when needed to reach your target.
First set the exact pixels with Image Resizer, then compress the result here. Leave Max Width empty so the size stays the same.
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Ready to Compress Your Image to 300 KB?
Upload your photo and download a smaller copy in seconds. JPG stays JPG. 100% free, no sign-up.
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