Question 1

What file types can Hero Converter handle?

Accepted Answer

Hero Converter supports 62+ conversions across four categories: Images (JPG, PNG, WebP, HEIC, AVIF, SVG, BMP, GIF, ICO, TIFF), Video (MP4, WebM, MOV, AVI, MKV), Audio (MP3, WAV, AAC, FLAC, OGG), and Documents (PDF, DOCX, HTML, TXT).

Question 2

Are my files uploaded to a server?

Accepted Answer

No. All conversion happens directly in your browser using native browser APIs and WebAssembly. Your files never leave your device — not even temporarily.

Question 3

Is Hero Converter really free?

Accepted Answer

Yes, completely free with no limits. Hero Converter is supported by advertisements to keep the service free. No sign-up required, no watermarks, no file size restrictions.

Question 4

What browsers are supported?

Accepted Answer

Hero Converter works in all modern browsers: Chrome, Firefox, Safari, and Edge. Image conversion works everywhere. Video and audio conversion requires a modern browser with hardware acceleration support (Chrome 94+, Edge 94+, Safari 16.4+).

Question 5

How does video conversion work in the browser?

Accepted Answer

We use hardware-accelerated browser APIs for video and audio encoding and decoding. This means conversions run at near-native speed without downloading any large binaries.

Question 6

Can I convert multiple files at once?

Accepted Answer

Yes! You can batch convert up to 50 image files, 20 audio files, or 10 video files at once. All converted files can be downloaded individually or as a single ZIP archive.

Question 7

What is HEIC and why do I need to convert it?

Accepted Answer

HEIC (High Efficiency Image Container) is the default photo format on iPhones and iPads. While it offers excellent compression, many Windows applications, websites, and non-Apple devices don't support it. Converting to JPG or PNG ensures universal compatibility.

Question 8

Will I lose quality during conversion?

Accepted Answer

It depends on the formats involved. Converting between lossless formats (e.g., PNG to BMP, WAV to FLAC) preserves perfect quality. Converting to lossy formats (JPG, MP3, MP4) involves some quality reduction, but you can control the quality level with the slider. At high settings, the difference is virtually imperceptible.

Question 9

Is there a file size limit?

Accepted Answer

There's no hard limit since everything runs in your browser. However, very large files (over 500MB for video, over 100MB for images) may take longer to process and could exceed your browser's memory. For best results, keep individual files under these sizes.

Question 10

Can I convert documents like Word files?

Accepted Answer

Yes. You can convert DOCX (Word) files to HTML or plain text. You can also convert images (JPG, PNG, WebP) to PDF documents. All processing happens in your browser.

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