Smaller images.Without the blur.

No. Spellense strictly locks and preserves your exact pixel dimensions. For example, a 1200×1200 image remains 1200×1200 after compression. We apply perceptual compression and remove bloat so your layout remains sharp without shrinking resolution.

Our interactive split-screen slider lets you drag a vertical divider line across your image. The left side shows your original uncompressed image, and the right side shows the compressed result in real time. You can zoom up to 2× to verify that text, logos, and edges remain razor sharp.

Yes! You can drop 10, 20, or more images at once, or drop a multi-page PDF catalog. Spellense automatically processes all pages and lets you download individual files or download everything in a single, organized ZIP archive. If you want to transform your compressed catalog into an interactive digital publication, try our Free 3D Flipbook Maker.

Never. 100% of the image compression takes place locally inside your browser using HTML5 Canvas and browser WebAssembly. Even faster than our spellchecker — your files never leave your device, and are never saved or trained on any server.

WebP is recommended for websites and digital media because it achieves up to 90% size reduction with virtually no noticeable difference. JPEG is ideal for print documents and client submissions. PNG is best when transparent backgrounds or pixel-level text contrast must be retained.

Yes. Spellense is a 100% free, private alternative to Squoosh and TinyPNG with zero subscription paywalls, no daily file limits, no 5MB file caps, and built-in batch ZIP download. For a detailed guide on WebP vs PNG compression algorithms and Core Web Vitals optimization, read our full guide: How to Compress Images Without Losing Quality.