How to Convert AVIF to TIFF: Step-by-Step Tutorial

By Bill Crawford  ·  March 2026  ·  6 min read  ·  Last updated March 7, 2026

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What This Tutorial Covers

This tutorial walks you through converting AVIF images to lossless TIFF format using the browser-based tool on this site. No software installation required. You will learn how to add files, understand the per-file status system, use batch ZIP download, and verify your TIFF output.

For background on why you might want TIFF and when to use it, see the companion AVIF to TIFF Complete Guide.

What You Need

• One or more .avif files you want to convert
• A modern browser: Chrome 85+, Firefox 93+, Safari 16+, or Edge 121+ (AVIF decoding requires these or newer)
• No account, no software, no subscription

Step 1: Open the Converter

Navigate to dataconversioncenter.com/image-tools/avif-to-tiff/. The page loads UTIF.js and JSZip from CDN — no install needed. All AVIF decoding is handled by your browser's native image decoder, and TIFF encoding runs entirely in JavaScript in your browser tab.

If your browser does not support AVIF decoding (older versions of Firefox or Safari), you will see an error message for each file. Upgrade your browser to resolve this.

Step 2: Add Your AVIF Files

You have two ways to add files:

• Drag and drop: Open your file manager and drag one or more .avif files directly onto the drop zone labeled "Drop AVIF files here". The zone highlights in blue when you hover over it.
• Browse: Click anywhere on the drop zone (or the "Browse Files" link) to open your file picker. Select multiple files using Ctrl+click (Windows) or Cmd+click (Mac).

Once you add files, the tool generates a thumbnail preview grid immediately using your browser's native AVIF renderer. Each card shows the filename, file size, and a "Ready" status badge.

Step 3: Choose Your Download Preference

Before clicking Convert, decide how you want to receive your output files:

• Individual downloads (default): Each converted TIFF has its own Download button in the output grid. Leave the "Download as ZIP" checkbox unchecked.
• ZIP archive: Check "Download as ZIP" to receive all converted TIFFs in a single timestamped archive named dataconversioncenter_avif_to_tiff_YYYYMMDDHHMM.zip.

For large batches — five or more files — the ZIP option is more convenient. For one or two files, individual download is quicker.

Step 4: Convert to TIFF

Click Convert to TIFF. The button text changes to "Converting…" and a progress bar appears below it. The tool processes files in pairs for efficiency. For each file:

1. The status badge changes from "Ready" to "Converting…" (amber)
2. The browser's createImageBitmap() API decodes the AVIF into a canvas
3. UTIF.js reads the RGBA pixel data and encodes a TIFF blob in memory
4. The status badge changes to "Converted" (green)

If a file fails to decode — for example, if it is corrupted or your browser does not support AVIF — the badge changes to "Error" (red) and a short error message appears below the filename. Other files in the batch continue converting.

Step 5: Download Your TIFFs

Once conversion completes, you have two download options depending on what you selected in Step 3:

• Per-file download: Each output card in the "Output Files" grid has a "⬇ Download TIFF" button. Click it to save that individual file. The output filename preserves your original filename stem with a .tiff extension (e.g., photo.avif → photo.tiff).
• Bulk download: Click Download All TIFFs (or Download ZIP if ZIP mode is enabled) in the download bar that appears below the output grid.

After download completes, the tool resets automatically so you can start a new batch.

Step 6: Verify Your TIFF Output

After downloading, open your TIFF in your preferred application to verify the output:

• macOS: Double-click to open in Preview. Use Tools → Show Inspector to confirm dimensions and color depth.
• Windows: Open with Windows Photos or Microsoft Paint. For full metadata inspection, use IrfanView (free).
• Adobe Photoshop: Open via File → Open. Check Image → Mode to confirm the color mode (RGB). Check Image → Image Size to confirm the dimensions match your AVIF source.
• GIMP: Open and check Image → Image Properties for full format details.

The converted TIFF should match the original AVIF in dimensions and visible content. File size will be substantially larger — this is expected for a lossless format.

Tips and Troubleshooting

AVIF not recognized

If the tool reports an error for a file you believe is a valid AVIF, verify the file extension and try in a different browser. Some older AVIF files encoded with niche encoders may trigger decode errors in certain browser implementations.

Very slow conversion for large files

High-resolution AVIF files (20 MP and above) require significant memory for canvas operations. If conversion is very slow, try processing fewer files per batch. Close other browser tabs to free up memory.

TIFF too large for your workflow

If you need a smaller lossless format, consider converting to lossless WebP instead, which is significantly more compact than TIFF while still being lossless. For lossy but high-quality output, the Image Compressor can reduce TIFF size with controlled quality settings.

ZIP download not triggering

Some browsers block multiple simultaneous file downloads. If the ZIP does not download, check your browser's download bar or notification area for a blocked download prompt and click "Allow".