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Compress JPG, JPEG, PNG and WebP images to exactly 300KB without noticeable quality loss. Perfect for government forms, websites, email, WhatsApp and social media — fast, secure and completely browser-based.
Drag & drop or click — Max 20 images • 50MB each
Choose the exact file size you need.
Compress your images to exactly 300KB for forms, websites, email attachments, and any platform with a 300KB file size limit.
Check the exact photo size requirements for SSC, UPSC, and Railway forms in our complete government form image size guide.
No software, no signup needed.
Drag & drop or select a JPG, PNG or WebP image. Max 50MB per file.
The 300KB target is already configured. You can adjust it or switch to quality mode in settings.
Click "Compress to 300KB". The tool binary-searches for the exact quality that hits your target. Download instantly.
Binary search algorithm finds the exact quality that brings your image as close to 300KB as possible — automatically.
Your images are processed entirely in your browser. Nothing is uploaded to any server. Zero data collection.
No queues, no waiting. Compression happens locally on your device in seconds.
Upload multiple images. Each is independently compressed to 300KB. Download all as a ZIP.
All major image formats supported. Convert between formats while compressing.
No signup, no watermarks, no limits. Free forever.
Compress all major image formats.
Perfect for photographs.
Camera images.
Transparent graphics.
Modern websites.
| Feature | WebAuzar | Most Online Compressors |
|---|---|---|
| Browser Processing | ||
| Batch Compression | ||
| ZIP Download | ||
| No Signup | ||
| Free Forever | Limited |
| Quality | Best For |
|---|---|
| 95% | Printing |
| 85% | Website |
| 75% | Social Media |
| 60% | |
| 40% | Government Forms |
When you set a target of 300KB, the tool uses a binary search algorithm to find the optimal compression quality. It starts at 50% quality and repeatedly halves or doubles the search range — converging on the highest quality that keeps the file under 300KB. For PNG files (which are lossless), it scales image dimensions instead. This typically converges in under 20 iterations, taking less than a second.
For photographs, JPG or WebP format gives the best quality at 300KB. PNG files are significantly larger at the same visual quality — if your image doesn't need transparency, convert to JPG or WebP using the format selector in settings. For images with text or sharp graphics, stay with PNG even if the file is slightly larger, as JPG compression creates visible artifacts around edges.
Very large images (e.g. 10MB+ RAW photos) or highly detailed PNGs may not reach 300KB without significant quality loss. In such cases, the tool compresses to the minimum quality (or minimum dimensions for PNG) it can. You'll see the actual output size in the before/after view. If the result is still over 300KB, consider cropping or resizing the image before compressing.
Common questions about compressing images to 300KB.
Upload your image and click "Compress to 300KB". The tool automatically adjusts compression quality to get as close as possible to the 300KB target while maintaining the best possible image quality.
Yes. PNG images are compressed by resizing dimensions when needed because PNG uses lossless compression. JPG and WebP images use quality adjustment for more accurate file size control.
Most images retain good visual quality after compression. Extremely large images compressed to very small sizes may show some quality loss depending on the original file.
Yes. All compression happens directly in your browser. Your files are never uploaded to our servers, ensuring complete privacy and security.
If your image is already below 300KB, it will remain unchanged and no unnecessary compression will be applied.
Yes. Upload multiple images and compress them together. Each image is processed individually and can be downloaded separately or as a ZIP archive.
The tool supports JPG, JPEG, PNG and WebP image formats. More formats may be added in future updates.
Some compression is always required to reduce file size, but our algorithm preserves as much visual quality as possible while reaching the target size.
Yes. This tool is suitable for compressing photos for government forms, competitive exams, passport applications and other portals that require image size limits.
Yes. You can compress passport photos to meet required file size limits without manually adjusting quality settings.
Yes. Many government recruitment and examination portals require images below specific size limits such as 20KB or 50KB. This tool helps you achieve those targets.
Yes. The compressor works on Android phones, iPhones, tablets, laptops and desktop computers using any modern web browser.
Yes. It works on Windows, macOS, Linux and ChromeOS without installing any software.
No. Everything works directly inside your browser. No software installation or plugins are required.
Yes. Compressing images to 300KB helps reduce email attachment size and makes sharing much faster.
Yes. Smaller images improve website loading speed, Core Web Vitals and overall user experience.
For JPG and WebP images, dimensions usually remain the same. PNG images may be resized if necessary to reach the requested file size.
Large images are supported, but extremely large files may take longer to process depending on your device and browser performance.
Yes. Since processing happens locally in your browser, the tool can continue working after the page loads even if your internet connection is interrupted.
WebAuzar offers fast browser-based image compression, supports multiple formats, protects your privacy, allows batch processing and requires no signup or software installation.
Choose another optimized compression target.
Compress images to exactly 10KB
For SSC, UPSC government forms
Compress images to exactly 30KB
For exam and job application forms
For websites and social media
Compress images to exactly 150KB
For high-quality web images
Compress images to exactly 250KB
Compress images to exactly 350KB
Compress images to exactly 500KB
Compress images to exactly 1MB
Compress by quality % or custom KB target