SwingFiles
heif → avifCONVERT • Local processing

Convert .HEIF → .AVIF

Render the source artwork or image into the target visual format. Processing happens on your device, with no file upload.

Convert .HEIF → .AVIF

Drop Files for Local Browser Processing

Auto-detects magic bytes • Zero daily caps • Instant ZIP & P2P Swing chaining

Target Format & Engine Parameters

CONVERT: Render the source artwork or image into the target visual format.

Compute Engine:

Technical Specifications: HEIF (.heif) vs AVIF (.avif)

Specification ParameterSource: .HEIF (HEIF)Target: .AVIF (AVIF)
Full Format NameHigh Efficiency Image File FormatAV1 Image File Format
IANA MIME Typeimage/heifimage/avif
Magic Byte Signature (Hex)66 74 79 70 6D 69 66 3166 74 79 70 61 76 69 66
Compression & FidelityLossless SupportedLossless Supported
Alpha / Transparency & DepthRGB / YCbCr (24–48 bit, Opaque)RGBA (Alpha Transparency Supported, 8–32 bit)
Typical Size Reduction Ratio16:118:1
OS & Platform SupportCross-Platform via SwingFiles WebAssembly EngineCross-Platform via SwingFiles WebAssembly Engine

Processing Steps

  1. 1. Drop .HEIF Files Locally
    Choose HEIF (image/heif) files from your device. The browser checks their type before processing.
  2. 2. Convert Locally
    Render the source artwork or image into the target visual format.
  3. 3. Save .AVIF or Swing P2P
    Download the .avif output, export a batch ZIP, or choose "Convert & Swing" to transfer it to another device.

Frequently Asked Questions

What does this HEIF to AVIF route produce?

Render the source artwork or image into the target visual format. The target format may have different quality or capabilities than the source.

Does the .heif file leave my device?

The conversion runs in your browser. Files are not uploaded to a conversion server.

Can I process large .heif files or batches?

There is no daily conversion quota. Large files and batch size depend on available browser memory and the format engine.

Reverse Pair (AVIF-TO-HEIF) & Related Format Conversions

Reverse: avif to heif
AVIF to HEIFHEIF to PNGHEIF to JPGHEIF to JPEGHEIF to WEBP

Same-Wi-Fi P2P Radar Discovery

Devices on the same Wi-Fi appear automatically below — zero codes needed

Scanning local Wi-Fi subnet… Open this page on another device to pair automatically
AES-256-GCM file key stays in the peer channel; compare fingerprints before transferringPeer-to-peer · live speed appears during transfer

Phone ↔ PC Room Pairing

VERIFY PEER
6-Digit Swing Room Code
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Drop Unlimited Files to Swing (20GB+ Direct-to-Disk Stream)

Zero cloud upload caps • 64KB chunked SCTP DataChannel • 4MB backpressure • Mobile Screen WakeLock protection

Ready for zero-cloud WebRTC SCTP streaming (64KB chunks, 4MB backpressure control).
WakeLock: STANDBY