---
pretty_name: tokenizers test data
viewer: false
---

# tokenizers-test-data

Test and benchmark fixtures for [huggingface/tokenizers](https://github.com/huggingface/tokenizers),
pulled on demand by the repo Makefiles (`make test` / `make bench` / `make fixtures`
via `hf download`).

## Layout

- `fixtures/` — multilingual + modality corpora for cross-language encode
  benchmarks. Organized, documented, and reproducible: see
  [`fixtures/FIXTURES.md`](./fixtures/FIXTURES.md) for provenance and
  [`fixtures/fixtures_manifest.json`](./fixtures/fixtures_manifest.json) for
  exact sources, pinned revisions, and sizes. Rebuild any file with
  [`fixtures/fetch_fixtures.py`](./fixtures/fetch_fixtures.py).
  - `fixtures/lang/<iso639-3>_<iso15924>.txt` — ~5 MB of real web text per
    language (FineWeb-2 / FineWeb), 13 non-Latin scripts + English baseline
  - `fixtures/modalities/` — source code, math/LaTeX, and coding-agent
    trajectories
- **Root files (legacy)** — tokenizer JSONs, vocab/merges files, and text
  corpora referenced by their flat paths from the `tokenizers` repo Makefiles
  (Rust, Python, and Node bindings) on `main` and release branches. Do not
  move or rename them; new additions should go into organized subdirectories
  instead.

## Licensing

Corpora under `fixtures/` are small excerpts of public datasets, each under
its own license — FineWeb/FineWeb-2 (ODC-By), open-web-math (ODC-By),
SWE-smith-trajectories (MIT), and permissively-licensed OSS repos for code
(see the manifest for the exact repo list and commit SHAs). Root-level files
predate this README and carry the licenses of their original sources.