Developer Tools

Free online developer tools for coding, debugging, and data processing. JSON formatters, encoders, decoders, validators, converters, testers, and generators — everything a developer needs in one place.

Essential Developer Utilities

ToolStand developer tools cover the daily tasks that slow down development workflows: formatting and validating JSON, encoding and decoding Base64, converting between data formats, testing regular expressions, generating UUIDs, decoding JWTs, and much more. Each tool is optimized for speed — paste your data, get results instantly, and move on. No server round-trips, no API keys, no waiting.

Why Browser-Based Developer Tools?

Command-line tools are powerful but require context switching — open a terminal, remember the syntax, pipe output. Browser-based tools are always available in a tab next to your code editor. They work on any device, require no installation, and handle edge cases gracefully. For quick one-off tasks like "format this JSON blob" or "decode this JWT token," opening a browser tool is faster than writing a script or looking up CLI flags.

Data Privacy for Developers

Many online developer tools upload your data to a server for processing. That means potentially sensitive code, API keys embedded in JSON, or proprietary data structures are sitting on someone else machine. ToolStand developer tools process everything client-side. Your data stays in your browser — zero uploads, zero server processing. This is especially important when working with production data, authentication tokens, or proprietary algorithms.

All Developer Tools on ToolStand

• JSON Formatter & Validator — Format, validate, and minify JSON with error line detection and color-coded output.
• JSON Minifier — Compress JSON by stripping whitespace. Size comparison stats before and after.
• JSON Schema Generator — Auto-generate JSON Schema from JSON data with type detection.
• JSON Compare — Semantic JSON comparison — find added, removed, and changed keys at any nesting level.
• JSONPath Tester — Evaluate JSONPath queries against JSON data with instant match highlighting.
• JSON to Java POJO Converter — Convert JSON to Java classes with Lombok, Jackson annotations, and nested object support.
• Base64 Encoder & Decoder — Bidirectional Base64 encoding and decoding with Base64URL variant support.
• JWT Decoder — Decode JWT tokens to inspect headers, payloads, and expiration times.
• Unix Timestamp Converter — Convert between Unix timestamps and human-readable dates bidirectionally.
• URL Encoder & Decoder — Encode and decode URL strings with percent-encoding for safe query parameters.
• HTML Entity Encoder — Encode/decode HTML entities for safe web content and XSS prevention.
• UUID Generator — Generate cryptographically random UUID v4 identifiers.
• Regex Tester — Test regular expressions in real time with match highlighting and group display.
• Regex Explainer — Translate regex patterns into human-readable explanations token by token.
• Text Diff Checker — Compare two texts side by side with color-coded LCS diff.
• Case Converter — Convert text between 8 formats: UPPER, lower, camelCase, snake_case, and more.
• Number Base Converter — Convert between binary, octal, decimal, and hexadecimal in real time.
• CSV to JSON Converter — Bidirectional CSV and JSON conversion with PapaParse smart parsing.
• XML Formatter & Validator — Format and validate XML with DOMParser error detection.
• XML to JSON Converter — Bidirectional XML and JSON conversion with recursive mapping.
• YAML Validator — Validate YAML syntax and convert to JSON with line-level error detection.
• SQL Formatter — Beautify and minify SQL for MySQL, PostgreSQL, and SQLite.
• Dockerfile Generator — Generate Dockerfile and Docker Compose files for Node, Python, Go, and Java projects.
• What Is My IP — Check your public IPv4, IPv6, ISP, and location instantly.

Frequently Asked Questions