JSON Formatter & Validator
Free online JSON Formatter, JSON Validator, Beautifier, and Minifier with exact line-number syntax error diagnostics. Pretty print, lint, and compress JSON payloads 100% locally in your browser.
CrowdFeatures Developer Utilities Suite
13 fast, privacy-first client-side developer utilities for converting time zones (ET, CT, MT, PT, UTC, IST), formatting JSON/YAML/SQL payloads, decoding JWT tokens, debugging regular expressions, and generating UUID v4/v7 identifiers locally.
Time Converter & World Time Zone Dashboard (ET, CT, MT, PT, UTC, IST)
Free online Time Converter and live World Time Zone Dashboard. Instantly convert current time or custom dates across ET (EST/EDT), CT (CST/CDT), MT (MST/MDT), PT (PST/PDT), UTC, IST, GMT, CET, and JST with automatic Daylight Saving Time.
JSON to YAML Converter
Convert JSON objects and API payloads into clean YAML 1.2 configuration files instantly in your browser. Ideal for Kubernetes manifests, Docker Compose, OpenAPI specs, and GitHub Actions.
YAML to JSON Converter
Instantly convert YAML (.yml) configurations to strict JSON objects in your browser. Validate YAML indentation, resolve anchors, and pinpoint syntax errors by line number.
SQL Query Formatter & Beautifier
Free online SQL Formatter and SQL Beautifier for PostgreSQL, MySQL, SQLite, SQL Server (T-SQL), BigQuery, Snowflake, and Oracle PL/SQL. Format complex JOINs, CTEs, and subqueries locally.
OpenAPI / Swagger Editor & Live Preview
Free online Swagger Editor and OpenAPI 3.0 / 2.0 live viewer. Edit API specifications in YAML or JSON and preview interactive Swagger UI endpoint documentation in real time.
JWT Token Decoder & Inspector
Free client-side JWT Decoder and JSON Web Token debugger. Instantly decode JWT header algorithms (HS256, RS256, ES256), payload claims (sub, iss, aud, exp, iat), and expiration status with zero network calls.
Regex Tester & Regular Expression Debugger
Free online Regex Tester and Regular Expression debugger for JavaScript & TypeScript. Highlight matches in real time, inspect numbered & named capture groups, and test presets for Email, URL, UUID, and IPv4.
UUID v4 / v7, ULID & Secret Key Generator
Free online UUID Generator for RFC-9562 UUID v4, time-ordered k-sortable UUID v7, lexicographical ULIDs, and 256-bit cryptographic API secret keys using Web Crypto CSPRNG.
Unix Timestamp & Epoch Time Converter
Free online Unix Timestamp & Epoch Converter. Instantly convert Unix epoch seconds, milliseconds, or nanoseconds to human-readable UTC, ISO-8601, RFC-2822, and local timezone dates, or convert dates back to epoch.
SHA-256, SHA-512 & HMAC Hash Generator
Free online SHA-256, SHA-512, SHA-384, and SHA-1 Hash Calculator & HMAC Signature Generator. Compute cryptographic digests and verify Stripe/GitHub webhook HMAC signatures in Hex and Base64 locally.
Base64 & Base64Url Encoder / Decoder
Free online Base64 Decoder and Base64 Encoder with full UTF-8 Unicode and URL-safe Base64Url support. Decode Base64 strings, HTTP Basic Auth headers, and Kubernetes secrets locally in your browser.
URL Encoder, Decoder & Query String Parser
Free online URL Encoder, URL Decoder, and Query String Parameter Inspector. Percent-encode strings with encodeURIComponent, decode URLs, and parse complex query parameters into structured key-value tables.