| What it does | Convert JSON to TOON format and reduce LLM token costs
| Free in-browser viewer for scientific and ML data files
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| Stage | Not given
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| Pricing model | Free
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| Pricing | Not given
| Free
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| Key features | - Converts JSON to TOON format with token savings of 30-60%
- Local browser processing with no server data upload
- Human-readable output maintaining clarity
- Token savings statistics and reporting
- Support for deeply nested objects and repetitive keys optimization
- Automatic JSON validation
| - Browse HDF5 groups, datasets and attributes
- Read Parquet schemas, row groups and column statistics
- Open Zarr v2 and v3 stores from a folder or a zip
- Inspect Apache Arrow and Feather files
- View CSV, TSV and Excel spreadsheets
- Load NumPy .npy and .npz arrays
- List safetensors tensors and step through TFRecord records
- Slice N-dimensional arrays and render heatmaps
- Parse every file locally, with no upload
- Work offline after page loads
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| What makes it different | - Token-optimized format designed specifically for LLMs unlike generic JSON
- Resilient fault tolerance compared to strict JSON syntax requirements
- Direct monthly cost reduction of up to 50% for high-volume LLM applications
- Complete client-side processing ensuring maximum data privacy
| - All data processing happens in your browser with no server uploads
- Opens very large files by reading only the bytes you view
- No installation, account or login required
- Comprehensive articles explaining data format specifications
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| Free plan | Not given
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| Open source | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 14 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 3 | 0 |
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| Citation Flow (Majestic) | 13 | 22 |
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| Referring domains (Majestic) | 13 | 20 |
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ViewKit