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Offline Data Tools
Work with CSV, JSON, JSON Lines, QR codes, and other structured values without an upload step. These tools are designed for quick inspection and small local workflows.
7 tools
Open a hosted tool or download its standalone version from the main directory.
- CSV FixerRepair CSV encoding, delimiters, dates, leading zeros, whitespace, and unsafe formulas locally.
- JSON FormatterFormat, validate, sort, and minify JSON locally in your browser.
- Base64 ConverterEncode and decode Unicode text or files as Base64 without uploads.
- Timestamp ConverterConvert local dates, ISO values, and Unix timestamps entirely offline.
- JSON Lines ConverterConvert JSON arrays to JSON Lines and JSONL or NDJSON back to a valid JSON array locally.
- CSV Merge & DeduplicateMerge multiple CSV or TSV files and remove exact duplicate rows locally.
- QR Code Generator & ReaderGenerate QR codes from text or read QR codes from local images without network access.