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Resize image to 300KB online
Resize an image to 300KB while keeping it as sharp as the target allows. Use this page for form uploads, verification, and strict size limits.
- Runs on your device
Drop images here
or browse · one image on Free
Supports JPG, PNG, WebP, GIF, BMP, AVIF
Target size picks the quality for you and never goes over the limit you set.
The result is never larger than this. If a size cannot be reached by quality alone, the image is scaled down to fit.
Free compresses one image at a time.
Free exports up to 4096px on the longest side
Why 300KB?
This target is commonly used for uploads with strict size limits. The preset below is tuned for 300KB so you can reach valid upload size quickly.
Best workflow to reach 300KB
- Upload your original image (JPG, PNG, or WebP input).
- Keep JPEG output and adjust only compression quality as needed.
- Download and verify the final size before form submission.
Quality guidance
- Start around medium-high quality for text-heavy or document photos.
- For strict limits, lower quality gradually instead of large jumps.
- If details still look soft, use a slightly larger KB target when allowed.
- Typical quality window for 300KB: 68-86%.
- Preserves fine edges and product detail better than lower caps.
Where this size is commonly used
- Typical for blog uploads, marketplace images, and listing forms.
- Common in portals with strict max-upload validation.
- Useful when you need faster upload speed on mobile data.
Output format used on this page
This page uses JPEG output for a balanced mix of compatibility, quality, and target-size control.
Target profile for 300KB
- Compression profile: quality-focused forms.
- Recommended max longest side: around 1920px before final compression.
- Compression band: medium-high; this page is tuned differently than nearby presets.
Try other KB presets
Related tools
- Image Compressor
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- Image Resizer
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- Image Converter
JPG, PNG, WebP, AVIF and more
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- Resize Images to Exact Dimensions
- Photo & signature resizer
Exact pixel size and KB range for exam and application forms
FAQ
How close to 300KB will my output image actually be?
The tool targets 300KB as closely as possible and typically lands within a few kilobytes. Exact output depends on the source image's detail level and format — simpler images reduce more cleanly and often hit the target precisely, while complex photos may need one further quality adjustment.
What should I do if my image stays above 300KB after reducing?
Lower the output quality slider one or two steps and try again. If the file remains above 300KB, try reducing the image dimensions slightly — large source photos often need both quality reduction and resizing to reach strict low-KB targets reliably.
Is JPEG the best output format for reaching the 300KB target?
JPEG is used on this page because it reaches the 300KB target most reliably for the majority of images. If you need a different output format, use the main Image Compressor tool where you can choose format and quality independently.
Can I use this to reduce a photo's size for a portal that requires under 300KB?
Yes, this page is designed specifically for form and portal uploads with strict KB limits. Upload your photo, let the preset apply, and download the output — then verify the file size before submitting to confirm it meets your portal's exact requirement.
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