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

By Bill Crawford  ·  March 2026  ·  6 min read  ·  Last updated March 5, 2026

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What This Tutorial Covers

This tutorial walks you through converting HEIC and HEIF photos to TIFF 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 handle any errors that arise.

For background on why you might want TIFF over JPG, see the companion HEIC to TIFF Complete Guide.

What You Need

• One or more .heic or .heif files (typically from an iPhone or iPad)
• A modern browser: Chrome, Edge, Firefox, or Safari (2023 or later)
• No account, no software, no subscription

Step 1: Open the Converter

Navigate to dataconversioncenter.com/image-tools/heic-to-tiff/. The page loads all required libraries (heic2any, UTIF.js, JSZip) from CDN — no install needed.

Step 2: Add Your HEIC Files

You have two ways to add files:

• Drag and drop: Open your file manager and drag one or more .heic files directly onto the drop zone labeled "Drop HEIC/HEIF 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).

As soon as files are added, the tool generates thumbnail previews for each one. You will see an Input Files grid with a card per file showing the filename, file size, and a Ready status badge.

Note: Files with an extension other than .heic or .heif are automatically rejected with an inline error message. They are not added to the conversion queue.

Step 3: Choose Download Mode

Before converting, decide how you want to download your TIFFs:

• Individual downloads (default): Leave "Download as ZIP" unchecked. After conversion, each output card has its own Download button, and a "Download All TIFFs" button appears for sequential bulk download.
• ZIP archive: Check "Download as ZIP". After conversion, a single "Download ZIP" button downloads all TIFFs in one file named dataconversioncenter_heic_to_tiff_YYYYMMDDHHMM.zip using your local date and time.

For batches of more than 5 files, the ZIP option is strongly recommended to avoid multiple browser download dialogs.

Step 4: Click "Convert to TIFF"

Click the blue Convert to TIFF button. The button label changes to "Converting…" and is disabled while conversion runs.

For each file in sequence:

1. The status badge on the input card changes from Ready to Converting…
2. heic2any decodes the HEIC to PNG pixel data in memory.
3. The pixel data is drawn to an HTML Canvas element.
4. UTIF.js encodes the canvas pixel data as a TIFF binary blob.
5. The status changes to Converted and an output card appears.

The progress bar at the bottom of the tool box tracks overall progress — "Converted X of N".

Files are processed two at a time in parallel for better throughput on larger batches while keeping browser memory usage manageable.

Step 5: Review the Results

After conversion completes, a summary banner appears: "✓ All N files converted successfully" or "Completed: X succeeded, Y failed."

An Output Files grid displays cards for each successfully converted TIFF, showing:

• A thumbnail preview (rendered from the same canvas data used for encoding)
• The output filename — same base name as the input with .tiff extension (e.g. photo.heic → photo.tiff)
• Output file size (expect 10–15× larger than the original HEIC)
• A per-file Download TIFF button

Any files that failed to convert are marked with a red Error badge. Common causes: the file was not actually a valid HEIC (e.g. a renamed JPG), or the browser ran out of memory on a very large file. The tool continues converting remaining files when one fails.

Step 6: Download Your TIFFs

Individual download

Click the ⬇ Download TIFF button on any output card to save that file. The filename is the same as the input with .tiff appended.

Download All (no ZIP)

With "Download as ZIP" unchecked, click Download All TIFFs. The tool triggers sequential browser downloads with a 120 ms delay between each to prevent browser throttling.

Download ZIP

With "Download as ZIP" checked, click Download ZIP. JSZip assembles all TIFF blobs in memory and downloads a single file named, for example, dataconversioncenter_heic_to_tiff_202603051709.zip. This is the fastest approach for large batches.

Step 7: The Tool Resets Automatically

After a ZIP download or "Download All" completes, the tool automatically resets to its initial empty state. All thumbnails, cards, and file references are cleared. The checkbox resets to unchecked. This prevents accidental re-downloads and keeps the browser's memory clean between sessions.

If you want to reset manually at any point, click Start Over.

Troubleshooting

• File shows Error status: The HEIC decoder could not parse the file. Verify it is a genuine HEIC by checking the extension and that it was captured on an Apple device. Renamed files (e.g. a JPG with a .heic extension) will fail.
• Thumbnails not generating: Some very large HEIC files (48 MP from iPhone 15 Pro) may take 5–10 seconds to decode the preview. The tool will proceed when ready.
• Safari issues: Safari's HEIC support in JavaScript depends on OS version. macOS 12+ and iOS 16+ typically work. On older Safari, use Chrome or Edge instead.
• Out of memory on large batches: Processing 48 MP TIFFs (130+ MB each) requires significant browser memory. Close other tabs and process in smaller batches if needed.
• ZIP not downloading: Some browsers require a user interaction to trigger multiple downloads. Ensure you clicked the Download ZIP button directly (not from a script).

Next Steps After Conversion

With TIFF files in hand, here are common next steps:

• Open in Photoshop: TIFF files import losslessly. Use as a base for retouching, color correction, or compositing.
• Import to Lightroom: TIFF files added to your Lightroom catalog preserve all edits non-destructively as separate sidecar data.
• Send to a print shop: TIFF is the standard delivery format for commercial print. Set resolution to 300 DPI in your editing software before delivery.
• Compress for web: Use Image Compressor to create a web-optimized JPG or WebP from your TIFF master.
• Resize for specific output: Use Image Resizer to scale the TIFF to target dimensions.

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