Precision Image & Signature Compressor
Compress photographs and signatures to an exact kilobyte ceiling with zero cropping and zero visual quality loss.
Click or drag & drop your image here
Supports JPG, PNG, WEBP • Full original framing & sharpness preserved
Browse Device FilesFrequently Asked Questions
Will the compressed file ever exceed my chosen KB size (e.g., 50.1 KB when set to 50 KB)? ▼
No. If you select 50 KB, our binary-search byte engine locks a hard upper ceiling at 50.0 KB (51,200 bytes). It verifies the exact output byte count before finishing so the result is always strictly at or below your chosen KB size—never 50.1 KB.
How does this tool prevent image quality drop and cropping? ▼
Zero cropping is ever performed—your full image frame and aspect ratio remain 100% intact. To prevent blurriness or compression blocks, our engine enforces a high JPEG quality floor (74%–98%) and uses multi-step high-smoothing canvas rendering so facial features and ink strokes stay razor-sharp.
How does the Signature Compressor mode differ from the Image mode? ▼
Signature mode flattens transparent PNG backgrounds onto a crisp pure-white canvas and preserves high-contrast ink strokes, making it effortless to hit tight 10 KB – 20 KB limits without blurry handwriting.
Are my photos or signatures stored on any server? ▼
Never. Every calculation uses your device's built-in HTML5 Canvas and Web APIs. Your images never leave your phone or computer.
Privacy Policy
1. Zero Server Uploads (100% Local Processing): OptiScale Studio processes all images and signatures locally inside your web browser using client-side HTML5 Canvas APIs. We do not upload, transmit, store, or view your photographs or signatures on any external server.
2. No Account or Personal Data Required: You can use all features of this website without creating an account, logging in, or submitting personal identification details.
3. Third-Party Advertising & Cookies: To keep this tool free, we display advertisements via Monetag and third-party ad networks. These networks may use cookies, web beacons, or non-identifying scripts to serve relevant advertisements.
4. Temporary Browser Memory: Uploaded files exist only in your device's volatile browser memory (RAM) while the tab is open and are immediately cleared as soon as you refresh or close the page.
5. Policy Updates: We may update this Privacy Policy periodically to reflect technical or regulatory changes. Continued use of the website constitutes acceptance of these terms.