Compress Image
PopularReduce file size to exact target in KB (50, 100, 200, 500 or custom). Binary search optimization for best quality.
JPEGWebPBinary Search
Open toolAll Image Tools
Every tool runs locally in your browser. No uploads. No tracking. Completely free.
Core Tools
Quick Compress Presets
Compress to 50 KB
Optimized for strict file size limits like government forms and ID photos.
JPEGWebP
Open toolCompress to 100 KB
PopularPerfect for email attachments, job applications, and web uploads.
JPEGWebP
Open toolCompress to 200 KB
Ideal for profile pictures, documents, and moderate quality requirements.
JPEGWebP
Open toolHow FileToolkit Works
Built for users who value privacy, speed, and simplicity.
Zero Uploads
Files never leave your browser. All processing is client-side.
No Tracking
No analytics, cookies, or fingerprinting. Your privacy is absolute.
Instant Processing
No server queue. Results in milliseconds, not seconds.
Completely Free
No subscriptions, limits, or watermarks. Free forever.
Frequently Asked Questions
Are my images uploaded to a server?
No. All image processing happens entirely in your browser using the Canvas API. Your files never leave your device.
Is there a file size limit?
The browser handles files up to ~50MB comfortably. Very large images may cause memory issues on mobile devices.
Which formats are supported?
Input: JPEG, PNG, WebP, HEIC (if browser supports). Output: JPEG, WebP, PNG depending on the tool.
Can I reach any target file size?
Not always. The tool uses binary search to find optimal quality. If the target is impossible even at minimum quality, it will tell you and suggest resizing.
Does it work offline?
Yes, once the page loads, all tools work without an internet connection.
Is there a mobile app?
FileToolkit is a Progressive Web App. You can install it from your browser's menu on mobile and desktop.
Start processing your images now
No account needed. No file uploads. Completely free.