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TMDB Lookup
Search The Movie Database by title, parsed automatically from Plex-style filenames. Browse matches with year, overview, and thumbnail, and load full details with one click.
✦ TMDB lookup. Cover art. Cast & crew. Cross-platform.
Give your movie files proper metadata.
TagTiger is a cross-platform metadata tagger for MP4/M4V movies. Search TMDB, pick a poster from a grid, and write Apple/iTunes-style atoms straight into the file — title, release date, descriptions, genres, content rating, studio, cast & crew, HD/4K definition, and cover art. No external command-line tools required — it's a single native binary on Linux, macOS, and Windows.
TagTiger
Linux • macOS • Windows
TitleThe Matrix
Release1999-03-31
RatingR
GenresAction, Science Fiction
Definition1080p HD
DirectorLana & Lilly Wachowski
Fast-start onCover art ready
Features
Everything you need to tag a movie, in one editor.
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Poster Grid & Custom Art
Pick cover art from a grid of TMDB posters, or paste and drop your own image. Copy, cut, and replace the poster, and save it as the covr atom right in the file.
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Full Apple/iTunes Atoms
Writes the atoms Apple's ecosystem expects — title, release date, short and long descriptions, genres, content rating, studio, media kind, and definition — so files look right in the Apple TV app and Plex.
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Cast & Crew Plist
Builds the iTunMOVI plist with cast, directors, producers, and screenwriters, embedded in the standard ----/com.apple.iTunes atom.
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Per-Field Locks
Lock any field so it isn't overwritten when you select a different TMDB match. Edit what you want, keep what you've curated, and every change supports undo/redo.
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HD / 4K Definition
Set SD, 720p, 1080p, or 4K explicitly. If not already specified in the file, TagTiger deduces it from the video track's dimensions. It writes the standard hdvd atom.
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Fast-Start Layout
A Fast-start checkbox controls whether the file is saved web-optimized (moov before mdat) or with moov last. Existing layout is preserved when you leave it untouched.
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Pure-Rust Atom Writing
MP4 atom writing happens in-process via the pure-Rust mp4ameta crate — no ffmpeg, AtomicParsley, or other external tools to install or keep on your PATH.
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Your TMDB Credential
Enter a TMDB v4 read access token in Settings, or set an environment variable. The saved token takes precedence and is applied instantly — no restart required.
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Open With & Drag-and-Drop
Open an MP4/M4V from the menu, by dragging it onto the window, or via an "Open With" launch. The window, dock, and taskbar all carry the app icon.
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Command-Line Tool
A thin CLI ships alongside the app: search, inspect, and tag a file from the terminal. On macOS, install it to your PATH from the Help menu.
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Inspect Existing Tags
Read back the full set of tags already in a file — title, dates, kind, definition, rating, genres, studio, crew, cast, summaries, and whether cover art is present.
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Cross-Platform Desktop App
A native egui desktop app plus a single-binary CLI for Linux, macOS, and Windows, on both x86-64 and ARM64 — signed and notarized where the platform supports it.
Screenshots
A focused editor for movie metadata.
Metadata Editor
Search TMDB, edit every field with
per-field locks, undo, and redo.
Command Line Tool
Search TMDB, tag and inspect from the command line.
Pricing
Simple app licensing.
Buy TagTiger once for the desktop application and CLI, then search TMDB, pick posters, and write full Apple/iTunes metadata into your MP4/M4V movies across all your computers. A license key also removes the startup splash and periodic reminder.
$15 software license
A cross-platform MP4/M4V movie metadata tagger with TMDB lookup and cover art, for Linux, macOS, and Windows.
- TMDB movie search with a poster grid
- Apple/iTunes atoms: title, dates, descriptions, genres, rating
- Studio, media kind, and HD/4K definition
- Cast, directors, producers & screenwriters (iTunMOVI)
- Cover art from TMDB or your own pasted/dropped image
- Per-field locks with undo/redo
- Fast-start (web-optimized) save layout
- Pure-Rust atom writing — no external tools required
- GUI editor plus a single-binary CLI
- Linux, macOS, and Windows on x86-64 and ARM64
FAQ
Common questions
What is TagTiger?
TagTiger is a cross-platform metadata tagger for MP4/M4V movie files, written in Rust. It looks up movie metadata and posters from The Movie Database (TMDB) and writes Apple/iTunes-style atoms directly into the file — the same tags the Apple TV app, iTunes, and Plex read.
What metadata does it write?
Title, release date, short and long descriptions, genres, content rating, media kind (movie/TV), HD/4K definition, studio, cover art, and an iTunMOVI plist with cast, directors, producers, and screenwriters. TV episode atoms are planned.
Do I need any other tools installed?
No. MP4 atom writing is done in-process with the pure-Rust mp4ameta crate, so there are no external command-line tools like ffmpeg or AtomicParsley to install. TagTiger ships as a single native binary per platform.
How do I get a TMDB token?
You'll need a free TMDB account and an API Read Access Token. Create one under Settings → API on themoviedb.org, then paste the v4 read access token into TagTiger's Settings dialog. It's saved locally and used to authenticate your searches; you can also supply it via an environment variable.
Can I use my own poster art?
Yes. Alongside the TMDB poster grid, you can paste an image from the clipboard or drag-and-drop one onto the window, then copy, cut, or replace the current cover before saving it into the file.
Why does the saved poster art have its size reduced?
Posters from TMDB can be very large. iTunes and the AppleTV don't really take advantage of huge resolution poster files. TagTiger clamps the maximum width and/or height of an image to 1000 pixels while preserving the aspect ratio. This saves space in the saved MP4/M4V file.
What is fast-start, and will TagTiger change my file's layout?
Fast-start (web-optimized) means the moov atom is placed before the media so playback can begin before the whole file downloads. A checkbox controls it on save; when you don't change it, TagTiger preserves your file's existing layout.
Is there a command-line version?
Yes. A CLI ships alongside the GUI with search, inspect, and tag commands. On macOS you can install it to your PATH from Help ▸ Install Command-Line Tool…, which links the notarized binary inside the app.
Which platforms are supported?
Linux, macOS, and Windows, on both x86-64 and ARM64. macOS ships a notarized .dmg; Windows ships a signed .zip; Linux includes .deb, .rpm, and .tar.gz packages.
I'm having trouble downloading on Windows!
Microsoft Edge and Microsoft Defender make it very difficult to download software from the internet these days. See this page for instructions on how to download and install perfectly safe and free software from the internet.
Do I need a license for each computer?
No. TagTiger is free to use, and one optional license key is good for all platforms and all computers that you as an individual own. Send an email to Glowing Cat Software for information about commercial licenses.
Is TagTiger open source?
Yes. TagTiger source is available under the GPL 3.0 license.
Can I download and use TagTiger without a license?
Yes. TagTiger is donationware — purchasing a license is optional, but it removes the startup splash and periodic reminder and helps support open source software development.
Ready to tag your movie collection?
Download TagTiger to search TMDB, pick posters, and write full Apple/iTunes
metadata into your MP4/M4V files — on Linux, macOS, and Windows.
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