Data tools
Ten instant data utilities for CSV, JSON, YAML, XML, logs, dates, and more — all run entirely in your browser.
100% client-side · no upload · no tracking
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CSV Merger
Paste two or more CSV blocks and merge them into a single file — headers are deduplicated automatically.
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CSV Splitter
Split a large CSV into smaller chunks by row count and download each chunk separately.
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JSON ↔ CSV Converter
Convert a JSON array to CSV or a CSV file to a JSON array — bidirectional, client-side.
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JSON Schema Validator
Paste a JSON document and a JSON Schema to validate structure, required fields, and types instantly.
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YAML Validator
Check YAML syntax for errors and pretty-print valid YAML — no upload, runs in your browser.
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XML Formatter
Paste minified or messy XML and get a properly indented, readable version in one click.
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Log Line Parser
Parse Nginx, Apache, syslog, or JSON log lines into structured columns — timestamp, level, message.
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Date & Time Parser
Parse any date string and see its components — year, month, day, Unix timestamp, ISO 8601, and more.
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IPv6 Expander
Expand a compressed IPv6 address to its full 8-group notation and normalize the representation.
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Unicode Search
Search Unicode characters by name or code point — copy the character, HTML entity, or escape sequence.
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Why use browser-based data tools?
Every tool on this page runs entirely inside your browser — your CSV files, JSON documents, logs, and configuration data never leave your device. That means instant results, complete privacy, and tools that work offline without requiring any signup or server-side processing. Whether you're merging CSVs from two exports, validating a JSON Schema, or expanding an IPv6 address, these tools give you developer-grade output in seconds.