Free Convertio Alternative — Convert Images Locally

Free Convertio alternative that converts HEIC, WebP, and AVIF images to JPG/PNG locally in your browser. No file uploads, no daily limits, complete privacy.

Convertio is a popular cloud converter — but it uploads your files to their servers, limits free users to 100MB per day, and adds waiting times for large files. Our browser-based alternative converts images instantly with no uploads, no daily limits, and no waiting. Your files never leave your device.

Private — processing happens in your browser

Drop images to convert

HEIC, WebP, PNG, JPG, BMP, GIF, AVIF, TIFF • Max 100MB

🔒100% Private — Your files never leave your device. All processing runs locally in your browser.

How It Works

Convert images between all major formats using your browser's native Canvas and encoding APIs. The tool supports HEIC, WebP, AVIF, PNG, JPG, and BMP — including Apple's HEIC format which many online tools can't handle.

Drop one or multiple images, select your target format and quality settings, then batch-convert all files at once. Each image is re-encoded client-side with no server upload required.

Features

  • Full HEIC/HEIF support — convert iPhone photos to JPG instantly
  • Batch conversion — process dozens of images at once
  • Support for HEIC, WebP, AVIF, PNG, JPG, and BMP formats
  • Adjustable output quality for lossy formats
  • Preserves image dimensions and color accuracy
  • Download individual files or all converted images at once

Frequently Asked Questions

Convertio uploads your files to their servers and limits free users to 100MB/day. BestOnline.Tools processes everything locally — unlimited conversions, complete privacy.

More Free Tools

Explore our other browser-based conversion tools