Compress Image to Exact Size
Drop any image, pick your target size, download in seconds.
100% free. No uploads. No signup. Total privacy.
Why Choose CompressTo?
Exact Size Targeting
Unlike other tools, you set the exact KB size you need. Our algorithm guarantees your image will be at or under your target.
100% Private
Your images never leave your device. All processing happens in your browser. Optional analytics runs only with your consent and never includes your files or filenames.
Lightning Fast
Powered by a smart binary search algorithm, compression completes in under a second for most images.
Works Everywhere
Use on any device — desktop, tablet, or phone. Install as an app for quick access. Even works offline.
How It Works
Drop Your Image
Drag & drop, click to browse, or paste from clipboard. Supports JPG, PNG, WebP, BMP, and GIF.
Choose Target Size
Pick a preset (20KB, 50KB, 100KB, 200KB, 500KB) or enter any custom size.
Download Result
Get your compressed image instantly. Compare quality with our before/after slider.
Popular image-size tools: Compress to 50KBCompress to 100KBCompress to 200KBCompress to 500KBCompress Image to 1MB
Frequently Asked Questions
Everything you need to know about CompressTo
CompressTo uses a smart binary search algorithm that automatically finds the optimal balance between image quality and file size. It tests different compression levels in milliseconds to find the highest quality that fits within your target size. If needed, it intelligently adjusts image dimensions to ensure we always hit your target while maintaining the best possible visual quality.
Your images NEVER leave your device. CompressTo processes everything directly in your browser using the HTML5 Canvas API. There are zero server uploads, zero data transfers, and zero privacy risks. Your files stay on your computer or phone at all times — we never see them.
CompressTo supports all common image formats: JPEG (JPG), PNG, WebP, BMP, and GIF. You can output your compressed image as either JPEG (maximum compatibility) or WebP (25-35% smaller files at the same visual quality).
WebP is a modern image format that produces 25-35% smaller files than JPEG at the same visual quality. This means you get higher quality images at your target size. WebP is supported by all modern browsers (Chrome, Firefox, Safari, Edge). Choose JPEG only if you need compatibility with very old software.
Simply drop your photo into CompressTo, select the required size (commonly 20KB, 50KB, or 100KB), and click download. Our tool automatically finds the highest quality compression that fits within the form's size limit. Most government portals accept JPEG format.
CompressTo uses a 'Smart Balance' algorithm that minimizes quality loss. Instead of just crushing quality like most tools, we intelligently balance compression level and image dimensions to produce the best possible result. You can always check the before/after comparison slider to judge the quality before downloading.
Yes! CompressTo is fully optimized for mobile devices. You can take a photo, drop it into the tool (or paste from clipboard), select your target size, and download — all from your phone's browser. You can even install it as an app on your home screen for quick access.
Yes, CompressTo is 100% free to use with no limitations. There's no signup required, no email needed, no watermarks, and no daily limits. Compress as many images as you want, whenever you want.
You can set a target as small as 5KB. However, very small targets (under 20KB) may result in significant quality loss for large photographs. CompressTo will show you a quality indicator and warning if the compression is too aggressive, so you can make an informed decision.
When enabled, CompressTo will never reduce your image dimensions — it only adjusts compression quality. This is useful when you need specific pixel dimensions (e.g., passport photos at 600×600). Note that preserving dimensions may mean higher quality loss to reach very small target sizes.