TIFF to AVI Converter

How to Convert TIFF to AVI Online

1. Upload Your TIFF Files: Click "+ Add Files" or drag-and-drop your .tiff / .tif files. Multi-page TIFFs (linked IFD chains, common from scanners and microscopes) and large BigTIFFs are accepted. Batch upload is supported — drop the entire image sequence at once.
2. Pick Merge Strategy and Image Duration: Choose Merge images to assemble the whole sequence into a single AVI (time-lapse, slideshow, microscopy stack) or Video per image to render each TIFF as its own short clip. Set Image Duration per frame (1/60s, 1/30s, 1/24s, 1/10s, 1/5s, 1/4s … up to 10s) — 1/24s gives 24 fps cinematic playback, 1s creates a one-frame-per-second slideshow.
3. Set Codec, Quality Preset, and Resolution (Optional): Pick a Video Codec (MPEG-4 / Xvid / DivX for compatibility, MJPEG for frame-accurate scientific work, H.264 for size). Choose Quality Preset (Lowest → Highest, default Very High) or switch to Constant Quality / Constrained Quality for CRF-style control. Pick a Resolution Preset (Original, 720p, 1080p, 1440p, 2160p) or enter custom width × height. Optionally set a Background Color for letterboxed frames.
4. Convert and Download: Click Convert. The output is an AVI 2.0 (OpenDML) container that handles files past the legacy 2 GB AVI 1.0 cap. No watermarks, no sign-up.

Why Convert TIFF to AVI?

TIFF is a still-image container — high bit-depth, often lossless, and able to chain dozens or thousands of frames via linked Image File Directories (IFDs). AVI is Microsoft's 1992 video container, still the lingua franca for Windows-native players, legacy lab software, and frame-accurate analysis tools. Turning a TIFF sequence into AVI is how you go from "a folder of stills" or a multi-page scan to something you can scrub, share, and embed.

• Microscopy and bioimaging time-lapse — Confocal, widefield, and electron microscopy stacks are routinely captured as 16-bit TIFF sequences (or OME-TIFF). AVI with MJPEG or uncompressed video preserves frame-by-frame fidelity for ImageJ/Fiji review, while H.264 in AVI gives a shareable copy for slides and grant submissions.
• Astrophotography and planetary stacking — Cameras like the ZWO ASI and QHY save lights as 16-bit TIFFs; converting the calibrated sequence to AVI feeds it into AutoStakkert!, RegiStax, or PIPP for lucky-imaging stacking.
• Document and archive scans — Multi-page TIFFs from production scanners (Kodak i-series, Fujitsu fi-series) can be turned into a paginated AVI for visual review when a PDF isn't suitable.
• Time-lapse and stop-motion — DSLR shooters who export RAW → 16-bit TIFF for color grading need AVI as the output container before importing into Premiere, Resolve, or older NLEs that prefer AVI ingest.
• Industrial machine vision — Inspection cameras (Basler, FLIR, Allied Vision) dump TIFF frames per trigger; AVI with Xvid or DivX is the standard playback format for QA review stations running Windows.
• GIS and remote-sensing flyovers — Sequences of GeoTIFF tiles rendered as an AVI animation make it easy to QA a satellite pass or drone mission before producing the final deliverable.

If you need the reverse direction or a more modern container, see AVI to MP4 or AVI to TIFF for frame extraction.

TIFF vs AVI — Format Comparison

Codec Quick Guide for AVI Output

Frequently Asked Questions

How do I control the exact frame rate of my AVI output?

Frame rate is determined by Image Duration. Pick 1/24s for 24 fps, 1/30s for 30 fps, 1/60s for 60 fps, or use the longer presets (1s, 2s, 5s) for slideshow-style playback. Note that AVI's RIFF index stores frame timing per-frame, so non-integer rates (like the 1.8943 fps that researchers sometimes need for time-lapse intervals) may be rounded by downstream players — for sub-fps precision, MJPEG with a custom duration is the most predictable choice.

My TIFF has multiple pages — will all frames make it into the AVI?

Yes, when Merge images is selected. Multi-page TIFFs store frames as a linked list of Image File Directories (IFDs); the converter walks the chain and writes each page as a successive video frame. If you instead choose Video per image, each input TIFF (even multi-page) becomes its own output clip.

Should I pick MPEG-4 (Xvid), MJPEG, or H.264?

Use MJPEG if you need to scrub frame-by-frame in ImageJ/Fiji, VirtualDub, or scientific analysis tools — every frame is an independent JPEG, so seeks are exact. Use MPEG-4 / Xvid if you want a small, universally playable AVI on Windows. Use H.264 if file size is the priority and your player supports H.264-in-AVI (most modern players do, but MP4 is more native for H.264). Avoid H.264-in-AVI if the file is going into older lab software that expects DV, Xvid, or MJPEG.

Will my 16-bit or 32-bit scientific TIFFs preserve their bit depth?

Standard AVI codecs encode at 8 bits per channel, so 16-bit microscopy and astrophotography TIFFs are reduced to 8-bit during conversion. For analysis pipelines that depend on the full bit depth, work from the original TIFFs in ImageJ/Fiji and treat the AVI as a presentation copy. If you must keep high bit depth, look at MOV with ProRes or a 10-bit H.265 MP4 — see TIFF to MP4 or TIFF to MOV.

Why is my output AVI so large?

AVI containers don't compress as efficiently as MP4 by default, and MJPEG (a common AVI codec) stores every frame as a standalone JPEG with no inter-frame prediction. For a smaller file, switch to MPEG-4 (Xvid) or H.264, lower the Quality Preset from Very High to High or Medium, scale the Resolution Preset down (a 4K-resolution time-lapse rarely needs to stay at 4K for review), or shorten the per-frame Image Duration so the same content takes less wall-clock playback time.

Can I add audio — a soundtrack or voiceover — during conversion?

This converter writes a silent AVI (image sequences have no native audio track). To overlay a soundtrack, run the AVI through a desktop NLE (Premiere, Resolve, Shotcut) or use Video Cutter to trim it first, then mux in audio. AVI supports PCM, MP3, and AC3 audio at the container level.

Will the AVI play in Windows Media Player and QuickTime?

A standard AVI with MPEG-4 (Xvid) or MJPEG video plays in Windows Media Player on Windows 10/11 out of the box. Apple removed legacy codec support from QuickTime X (macOS), so for Mac users we recommend an MP4 output instead — see TIFF to MP4. VLC plays everything regardless of OS.

What's the file size limit for the output AVI?

Outputs are written as AVI 2.0 with OpenDML extensions (introduced 1996, led by Matrox), which raises the effective single-file cap from AVI 1.0's ~1 GB practical limit to 4 GB+ via multi-segment RIFF lists. For very long microscopy or astro sequences, that's enough to hold tens of thousands of frames at 1080p MJPEG.

Does it handle BigTIFF, OME-TIFF, and TIFFs with unusual compression?

BigTIFF (64-bit offsets, files past 4 GB) is supported on upload. OME-TIFF — the multi-dimensional microscopy variant — converts on the spatial frames; channel and Z-stack metadata is not carried into AVI since AVI has no equivalent dimension. TIFFs using LZW, Deflate, JPEG, PackBits, ZSTD, and WebP internal compression all decode normally before re-encoding into the AVI video stream.