Bread Dataset Viewer
Browse large JSONL, Parquet, and CSV datasets in VS Code with the Bread Dataset Viewer extension.
About Bread Dataset Viewer
Bread Dataset Viewer is a VS Code extension for browsing dataset files including JSONL, JSON, CSV/TSV, Parquet, and Arrow/Feather. It streams data in pages and loads only visible rows, with support for jump-to-line navigation.
It offers Cards, Table, and Raw views with collapsible JSON, search, and line numbers, plus 16 bundled LLM tokenizers for offline token counting. Standard JSON arrays are fully parsed, with a maximum tested size of 500 MB.
Key features
- Streams dataset files in 100-row pages on demand
- Cards, Table, and Raw views for dataset rows
- Collapsible JSON trees with line numbers and search
- Jump to specific line without loading prior rows
- 16 bundled LLM tokenizers that work offline
- Works with VS Code Remote including SSH, WSL, Containers
Best for: ML engineers, data scientists, and developers who inspect large JSONL, Parquet, or CSV files in VS Code.
Good for
- Loads only visible rows instead of entire files into memory
- Includes 16 bundled tokenizers that do not require internet
- Open source repository
Watch out for
- Standard JSON arrays are fully parsed, with 500 MB maximum tested size
Bread Dataset Viewer at a glance
- Category
- Development › Developer Tools
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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