Browser Tool — No Upload
Image Compressor
Compress JPG and PNG images instantly in your browser using HTML5 Canvas technology. Adjust quality, preview the result side-by-side, and download — without uploading a single byte to any server.
Quick Steps
- Select a JPG or PNG image file.
- Drag the quality slider (80% is a great starting point).
- Click "Compress and Download" to preview.
- Save your optimised file.
Preview
Upload an image to see the compressed preview.
How to Use the Image Compressor
Free · No Login · Browser OnlyQuarkova's Image Compressor uses the native HTML5 Canvas API to re-encode your image entirely within your browser window. Unlike traditional online compressors, your file is never sent to a server, which means zero waiting for uploads, zero privacy risk, and zero bandwidth cost on your device's data plan.
The quality slider controls the JPEG compression factor, ranging from 10% (maximum compression, smallest file) to 100% (lossless, original quality). For most everyday uses — social media posts, email attachments, website images — a quality setting between 70% and 85% gives an excellent balance: typically 50–70% smaller files with no perceptible visual difference on screen.
Once you click "Compress & Download", the tool draws your image onto an invisible HTML Canvas element, then calls canvas.toBlob() with your chosen quality setting to produce the optimised JPEG binary. This blob is then offered to you as a direct browser download — instant, private, and completely free.
🔒 100% Private
Your image never leaves your device. Processing is entirely local.
⚡ Instant Results
No waiting for server round-trips. Compression takes milliseconds.
📱 Works on Mobile
Fully responsive. Works on any modern smartphone or tablet browser.
Frequently Asked Questions
Does this tool work without login? ▾
Yes. Every Quarkova tool is immediately accessible without creating an account. Open the page and start compressing.
What image formats are supported? ▾
JPG, JPEG, PNG, WebP, GIF, BMP, and AVIF (on supported browsers). The output is always a JPEG file for maximum compatibility.
Is there a file size limit? ▾
No server limit. The only constraint is your browser's available memory. Modern browsers can handle images up to 50MB or more comfortably.
What quality setting should I use? ▾
For web images, 75–82% is ideal. For email attachments, 65–75% is fine. For print-quality output, use 88–95%.
Can I compress multiple images at once? ▾
Currently the tool processes one image at a time for simplicity. Batch processing is on the Quarkova roadmap.
Will the image dimensions change? ▾
No. The Canvas draws at the original natural dimensions of the image. Only the file encoding quality is changed, not the pixel resolution.