Developer & Data Tools
Format, validate, encode and inspect data with practical Developer and Data tools from NevioTools. Work with JSON, XML, YAML, Base64, URLs, UUIDs, JWT tokens, regular expressions, SQL queries, cron schedules and Unix timestamps directly in your browser.
Data Formatting & Conversion
Format, validate, convert and encode commonly used data formats.
JSON Formatter, Validator & Viewer
Format, minify and validate JSON data, then explore nested objects and arrays in a readable tree view.
XML Formatter & Validator
Format or minify XML documents and identify structural or syntax errors in the supplied data.
YAML Formatter & Validator
Format and validate YAML, sort mapping keys and inspect nested mappings and sequences in a tree view.
JSON ↔ YAML Converter
Translate structured data between JSON and YAML on demand, with explicit indentation and errors that point back to the source.
Spreadsheet Converter
Convert spreadsheets between XLSX, XLS, CSV, JSON, TSV and other supported data formats.
Base64 Encoder & Decoder
Encode text or files into Base64 and decode Base64 content back into readable text or downloadable files.
URL Encoder & Decoder
Encode reserved URL characters safely or decode percent-encoded URLs into their readable form.
JSON Testing & Validation
Query, compare and validate JSON documents and schemas.
JSONPath Tester
Run standards-based JSONPath expressions against local JSON and inspect every matching value beside its normalized location.
JSON Diff & Compare
Compare JSON by structure rather than formatting, tune array matching and export a precise change list or JSON Patch.
JSON Schema Validator
Test JSON instances against the intended Schema draft and trace each failure to its data path and governing keyword.
Developer Utilities
Generate identifiers, inspect tokens and work with common developer representations.
UUID Generator
Generate individual or bulk UUID identifiers using supported versions and copy or download the results.
Unix Timestamp & Epoch Converter
Convert precise Unix timestamps into readable dates or generate Epoch values from selected date and time values.
JWT Decoder
Decode a JSON Web Token and inspect its header, payload, claims and expiration information without verifying its signature.
Cron Expression Generator & Parser
Build cron expressions from scheduling options or translate existing expressions into readable descriptions.
HTML Entity Encoder & Decoder
Convert text and markup to named, decimal or hexadecimal references, or recover literal characters from entity-rich source.
Code & Data Analysis
Test patterns, format queries and verify data integrity.
Regular Expression Tester
Test regular expressions against sample text with live match highlighting, groups and replacement previews.
SQL Formatter
Format, indent and organize SQL queries to make complex statements easier to read and review.
File Hash & Checksum Calculator
Calculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 checksums to verify file integrity.