Compress Image to 300KB Online Free

Reduce any photo to 300KB (307,200 bytes) or under without losing quality. Works for JPG, PNG, WebP, and GIF. No upload to server. No signup required.

Drop images here or click to upload

Supports JPG, PNG, WebP, and GIF (100% browser-based)

How to Compress an Image to 300KB

Reducing your photo to 300KB takes less than a minute with this free tool:

Upload your image: Drag and drop or click to select your JPG, PNG, WebP, or GIF file. Your photo never leaves your device.
Target is pre-set to 300 KB: The tool is already configured to compress your image to 300KB (307,200 bytes, where 1 KB = 1,024 bytes). By default it outputs JPG, or you can toggle Preserve original format.
Click Compress: The tool reduces your photo to 300KB or under instantly and provides a download link.
Download: Save the compressed 300KB image directly to your device.

Why Do You Need a 300KB Photo Size?

A 300KB photo size is one of the most commonly required limits across different platforms and forms. Here are the typical situations where a 300KB file size is required:

Government portals: Many national ID, passport, and visa application portals accept photos up to 300KB in JPG or PNG format.
University and college admissions: Online admission forms often set a 300KB limit for photo and scanned document uploads.
Job application portals: HR portals and job boards commonly require profile photos and documents under 300KB.
Bank and financial forms: Online KYC and account opening forms typically cap photo uploads at 300KB.

Need a Different File Size?

Compress Image to 100KB - for government forms, visa portals, and job applications with a 100KB limit.
Compress Image to 50KB - for passport photos and strict portal uploads requiring 50KB.
Compress Image to 20KB - for the strictest government and exam registration portals.
Image Compressor (Custom KB) - set any custom target KB size for any requirement.

Other Free Image Tools

Passport Photo Size Maker - resize any photo to exact passport dimensions (3.5 x 4.5 cm).
ID Card Size Converter - convert your image to standard ID card dimensions (8.56 x 5.4 cm).
Image to JPG Converter - convert PNG, WebP, or HEIC photos to JPG before compressing.

Frequently Asked Questions

How do I compress an image to 300KB without losing quality?

Upload your photo above. The target is already set to 300KB. Click Compress and download. The tool uses smart quality reduction to keep the image as sharp as possible while staying at or below the 300KB target.

What is the 300KB photo size in MB and bytes?

300KB equals 307,200 bytes (since 1 KB = 1,024 bytes), or approximately 0.29 MB. Most smartphone photos are 3 to 8 MB, so compressing to 300KB reduces the file size by 90% or more while keeping high visual detail.

Is my image uploaded to a server?

No. All compression happens directly in your browser on your device. Your photos never leave your computer or phone.

Which formats can I compress to 300KB?

This tool supports JPG, PNG, WebP, and GIF. By default it outputs universally accepted JPG (with white fill for transparency), or you can enable “Preserve original format” to keep PNG, WebP, or static GIF output.