What problem does it solve?
HuggingFace Tokenizers addresses slow, inconsistent, or memory-heavy tokenization workflows by providing production-grade, Rust-backed tokenizers that tokenize large corpora quickly while preserving alignment to original text for downstream tasks.
Core Features & Use Cases
- High-throughput tokenization: Extremely fast Rust implementation suitable for batch encoding and large-corpus preprocessing.
- Train custom tokenizers: Support for BPE, WordPiece, and Unigram trainers with configurable vocab sizes and special tokens.
- Alignment and pipeline control: Full normalization, pre-tokenization, post-processing, offset mapping, padding, and truncation for QA, NER, and model training.
- Integration: Wrap trained tokenizers for use with transformers, export tokenizer files, and use datasets iterators for large-scale training and evaluation.
- Use case: Train a domain-specific BPE tokenizer on a 100GB corpus, enable fast batch encoding with offsets for span alignment, and export a transformers-compatible tokenizer for model training.
Quick Start
Train or load a fast tokenizer, encode your texts with padding and truncation enabled, and save the tokenizer for transformers-compatible inference.