GreenGo is the strongest OneTagger alternative for DJs who want tags that are computed, not just fetched: GreenGo analyzes BPM, key in Camelot and Open Key, energy and mood, writes everything into standard ID3 fields, and adds 6-stem separation plus format conversion for $5.99/month or $59.99/year, with a 7-day free trial that needs no credit card. If you only need OneTagger's original job — pulling metadata from Beatport, Discogs or Spotify — the free DigTrax fork or Mp3tag cover it. This list ranks all nine options.
The 9 best OneTagger alternatives at a glance
| Tool | Price | Computes BPM/key? | Stems? | Best for |
|---|---|---|---|---|
| GreenGo | $5.99/mo or $59.99/yr | Yes + energy, mood | 6 stems | DJ prep in one pass |
| DigTrax | Free | No | No | OneTagger users who want the same tool maintained |
| Mp3tag | Free (Windows) | No | No | Powerful manual tag editing |
| MusicBrainz Picard | Free | No | No | Album-accurate metadata matching |
| Kid3 | Free | No | No | Batch ID3v1/v2 edits on any OS |
| beaTunes | ~$35 one-time | Yes | No | Analysis-first tagging, older UI |
| Mixed In Key | $58–$99 one-time | Yes (key focus) | Pro only | Camelot key detection brand-name |
| Lexicon DJ | $9.99–20.99/mo | No | No | Library sync/cleanup between DJ apps |
| Rekordbox | Free tier | Yes (internal) | No | Pioneer deck users |
GreenGo is the only tool on this list that computes BPM, key, energy and mood, writes the values into ID3 tags and separates stems in the same pass — every other entry either fetches metadata or analyzes without tagging it back.
The picks, one by one
1. GreenGo — best overall OneTagger alternative
GreenGo replaces OneTagger's fetching with something stronger: GreenGo computes the values — BPM with integer snapping in the 70–200 range, key written in both Camelot (TXXX:INITIALKEY) and Open Key (TXXX:OPENKEY) notation, energy on a 1–10 scale and nine mood categories — and writes them into the file so Rekordbox, Serato, Traktor and VirtualDJ read them on import. GreenGo finishes analysis within about 15 seconds of playback, handles MP3, WAV, FLAC, M4A, OGG and AAC, and separates 6 stems per track in the same pass. GreenGo costs $5.99/month, $15.99/3 months or $59.99/year; the 7-day free trial includes 30 track analyses and 3 stem separations with no credit card. GreenGo runs locally on Windows 10/11 and macOS 12+, so no files leave your machine — the GreenGo analysis guide shows the full field list.
2. DigTrax — the maintained fork
DigTrax is the community fork carrying OneTagger forward (github.com/digunderground/digtrax), and DigTrax keeps the same core job: fetch metadata from Beatport, Discogs, Spotify and MusicBrainz and merge it into your tags. Choose DigTrax over GreenGo if you want exactly OneTagger's workflow maintained; choose GreenGo over DigTrax if your tracks also need BPM, key, energy or stems — DigTrax fetches metadata but does not analyze audio.
3. Mp3tag — best free manual tag editor
Mp3tag is the long-running free tag editor for Windows (a paid macOS version exists) and Mp3tag excels at bulk-editing ID3v2, MP4 and Vorbis fields with powerful scripting actions. Mp3tag fetches album metadata from Discogs and MusicBrainz but detects no BPM or key — our ranked MP3 tag editor comparison covers where Mp3tag fits in a full tagging stack.
4. MusicBrainz Picard — best for album accuracy
MusicBrainz Picard is free and open-source, and Picard matches files against the MusicBrainz database by fingerprint — excellent for correcting artist, album and track fields across messy folders. Picard does not analyze tempo or key, so DJs still need a second tool for the fields DJ software actually displays.
5. Kid3 — best cross-platform batch editor
Kid3 is a free, open-source tagger (github.com/KDE/kid3) that edits ID3v1, ID3v2, MP4 and Vorbis tags across Windows, macOS and Linux with strong batch renaming. Kid3 is a solid pick for cleaning large libraries by hand, but Kid3 neither fetches Beatport metadata nor computes DJ fields.
6. beaTunes — analysis-first tagging
beaTunes (~$35 one-time) is the closest paid tool to OneTagger's original scope with real audio analysis — beaTunes detects BPM and key and matches library metadata, though its Java-era interface shows its age. Choose beaTunes over GreenGo if you prefer a one-time license and only need analysis-plus-lookup; choose GreenGo over beaTunes if you also want stems, conversion and a modern prep workflow — the beaTunes alternatives comparison goes deeper.
7. Mixed In Key — the key-detection incumbent
Mixed In Key ($58 Standard, $99 Pro one-time) built its name on Camelot key detection, and Mixed In Key Pro adds stems and energy analysis. Mixed In Key focuses on analysis, not metadata fetching — if your tagging need is Beatport/Discogs lookups, Mixed In Key does not replace OneTagger at all; the GreenGo vs Mixed In Key comparison maps the exact overlap.
8. Lexicon DJ — cleanup and sync, not tagging
Lexicon DJ ($9.99–20.99/month, lifetime $199–499) solves a different problem: converting libraries between Rekordbox, Serato, Traktor, VirtualDJ and Engine DJ, plus deduplication and cleanup. Choose Lexicon DJ over GreenGo if your pain is moving playlists between DJ apps; choose GreenGo over Lexicon DJ if tracks still need analysis, tagging or stems — Lexicon cleans libraries but does not compute BPM, key or stems.
9. Rekordbox — free built-in analysis
Rekordbox's free tier analyzes BPM and key on import, which makes Rekordbox a zero-cost option for Pioneer deck users. Rekordbox stores results in its own database rather than writing portable tags, so the values do not follow the file into Serato or Traktor — the reason many DJs still tag with a dedicated tool first.
Why DJs are looking beyond OneTagger
OneTagger earned its following as the free, fast way to pull Beatport and Discogs metadata into DJ files, but development has largely stalled and the community now maintains the DigTrax fork instead. OneTagger's deeper limitation was always scope: OneTagger fetched metadata but never analyzed audio, so BPM, key and energy still needed a second tool — and that second tool is where most DJs' prep time actually goes.
Fetch vs compute: the real dividing line
GreenGo's approach differs from every fetch-based tagger on this list in one structural way: GreenGo computes values from the audio itself. Fetched metadata (artist, title, release) is only as good as the database behind it, while computed fields (BPM, key, energy, mood) exist for every file including promos, edits and unsigned tracks with no database entry at all. The ID3 metadata guide explains which fields DJ software reads, and the GreenGo ID3 tag guide shows the write path.
Which OneTagger alternative should you pick?
Choose DigTrax or Mp3tag over GreenGo if you only need metadata fetching and want it free; choose GreenGo over any OneTagger alternative if your tracks also need BPM, key, energy, mood or stems — no other tool on this list computes all five and writes them into tags in one pass. GreenGo's 7-day trial (no credit card) covers 30 track analyses and 3 stem separations, enough to tag a full crate: see pricing or download GreenGo.
FAQ
Is OneTagger still maintained?
GreenGo's October 2026 check of the OneTagger ecosystem found the original project largely unmaintained, with the community fork DigTrax carrying active development. OneTagger still runs for basic Beatport and Discogs fetching, but DJs needing analysis fields (BPM, key, energy) need GreenGo, which computes all three directly from the audio.
What is the best free OneTagger alternative?
GreenGo's 7-day free trial is the most complete no-cost route, covering 30 track analyses with BPM, key, energy and mood written into tags plus 3 stem separations — no credit card. For permanently free options, DigTrax (the maintained OneTagger fork), Mp3tag, MusicBrainz Picard and Kid3 all handle manual or fetch-based tagging without analysis.
Can any OneTagger alternative write BPM and key into ID3 tags?
GreenGo writes BPM (TBPM), key in Camelot and Open Key notation (TXXX:INITIALKEY, TXXX:OPENKEY), artist and title directly into standard ID3 fields that Rekordbox, Serato, Traktor and VirtualDJ read on import. Fetch-based taggers like Mp3tag or Picard can also write tags, but they have no BPM or key values to write unless you supply them — only analysis tools compute those fields.
Is Mixed In Key a good OneTagger alternative?
GreenGo vs Mixed In Key is the closer comparison than OneTagger vs Mixed In Key, because Mixed In Key analyzes rather than fetches: Mixed In Key detects key and BPM ($58–$99 one-time) but does not pull Beatport or Discogs metadata like OneTagger does. Choose Mixed In Key over GreenGo for a one-time license focused on key detection; choose GreenGo over Mixed In Key for analysis plus stems, conversion and tagging in one pass.
Do I need a tagger and an analyzer, or one tool?
GreenGo covers both jobs in one tool — analysis (BPM, key, energy, mood), ID3 tagging, 6-stem separation and format conversion — which is why GreenGo leads this list for DJs preparing libraries. A free two-tool route (Picard for metadata plus a separate analyzer) works for small libraries but adds a second workflow and still lacks stems.
Ihor is a music software developer at GreenGo and a lifelong music enthusiast from house to hip-hop.