OctalOne

100% Private & Offline-Ready

Your files are processed entirely on your device. Nothing is uploaded — works offline too!

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Image Converter

Convert images between formats (PNG, JPG, WEBP, BMP, ICO, GIF, AVIF, SVG) easily and securely in your browser. Detailed control over quality, ICO sizes, and transparency background fill.

Allowed: png, jpg, jpeg, webp, bmp, gif, svg, avif, ico, tiff, tif
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Conversion Settings
90%

Multi-Format Online Image Converter

Need to convert your images or create website icons? Our online image converter lets you switch between JPG, PNG, WebP, BMP, ICO, GIF, AVIF, and SVG formats in seconds.

  • 100% Private: Conversions execute locally inside your web browser.
  • ICO Favicon Generator: Package multi-size .ico files (16px to 256px) for websites and desktop apps.
  • Quality Control: Fine-tune compression slider for JPEG, WebP, and AVIF outputs.
  • Transparency Background Fill: Flatten transparent images with custom background colors.
  • Batch Processing: Convert multiple images simultaneously and download them individually or in a ZIP archive.

How to Convert Images

Convert formats in 3 easy steps:

  1. Import Files: Drag & drop your photos, icons, or vector graphics.
  2. Configure Settings: Choose your target format (e.g. JPG, PNG, ICO), quality level, or background fill.
  3. Convert & Download: Process your images instantly and save the output.

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Frequently Asked Questions

No, your images never leave your device. All conversion processing happens locally in your web browser using HTML5 Canvas and WebAssembly/Web Workers for 100% data privacy.

Yes, this tool is 100% free with no hidden subscriptions, no file size caps, no watermarks, and no limits on batch conversions.

You can import PNG, JPG/JPEG, WebP, BMP, GIF, SVG, AVIF, ICO, and TIFF files, and export to JPG, PNG, WebP, BMP, ICO (multi-size favicon packages), GIF, AVIF, and SVG.

Upload your PNG, JPG, or SVG logo, select 'ICO' as the target format, pick the 'Multi-Size Favicon' preset or a specific icon dimension (e.g. 16x16, 32x32), and click Convert.

Formats like JPG and BMP do not support alpha transparency. You can select your background fill color (White, Black, Custom, etc.) to smoothly flatten transparent areas.

Yes! Once this page is loaded in your browser, you can disconnect from the internet and continue converting images offline between all supported formats. All conversions happen entirely on your device without sending any data to a server.