Free Online Developer Tools – JSON, Code, JWT & Crypto Utilities
Essential client-side utilities for programmers and web developers. Format and validate JSON, test Regex, decode JWTs, generate UUIDs & Hashes, and format SQL.
JSON Formatter
Format, indent, beautify, and inspect JSON payloads with collapsible tree view and syntax highlighting.
JSON Validator
Validate JSON structure against RFC 8259, highlight exact syntax errors with line/column pointers.
JSON Minifier
Compress JSON data by stripping whitespace and newlines for high-performance API payloads.
JSON to CSV
Convert complex or flat JSON arrays into standard CSV spreadsheet files with automatic header detection.
CSV to JSON
Parse CSV and TSV spreadsheet tables into clean, structured JSON arrays and objects.
XML Formatter
Format, beautify, and cleanly indent XML documents with proper nesting and attribute spacing.
XML Validator
Validate XML documents for well-formedness, missing closing tags, and attribute syntax errors.
XML ↔ JSON Converter
Convert bidirectional between XML tags and JSON objects with attribute and namespace handling.
YAML Formatter & JSON Converter
Format YAML configurations, check syntax errors, and convert between YAML and JSON.
HTML Formatter
Beautify and indent HTML code with customizable tab spacing and tag hierarchy formatting.
CSS Formatter
Format, beautify, and reorganize CSS style sheets with clean selector and property indentation.
JavaScript Formatter
Beautify and format JavaScript (ES6+) and TypeScript code with clean braces, spacing, and quotes.
HTML Minifier
Compress HTML markup by removing whitespace, comments, and redundant quotes to boost web speed.
CSS Minifier
Compress CSS stylesheets into ultra-lightweight minified code with zero runtime overhead.
JavaScript Minifier
Compact JavaScript code by stripping unused comments and white-spaces for lightning delivery.
Base64 Encoder / Decoder
Encode and decode UTF-8 strings, URL-safe Base64, and binary files with 1-click clipboard copying.
URL Encoder / Decoder
Encode and decode URLs and query parameters using standard RFC 3986 percent-encoding.
JWT Decoder & Inspector
Decode and debug JSON Web Tokens (JWT) locally to inspect header algorithms, payload claims, and expiration dates.
UUID / GUID Generator
Generate RFC 4122 compliant UUID v4 and v1 strings individually or in bulk with custom format options.
Hash Generator
Generate cryptographic checksums in MD5, SHA-1, SHA-256, SHA-384, SHA-512, and HMAC formats.
MD5 Generator
Calculate 128-bit MD5 hash checksums from text strings and code snippets in real time.
SHA-256 Generator
Generate 256-bit SHA-256 cryptographic hash fingerprints using hardware Web Crypto primitives.
Regex Tester
Test, debug, and explain Regular Expressions with real-time match highlighting and capture group breakdowns.
Cron Expression Generator
Build cron expressions with visual minute, hour, day, month pickers and read human-friendly descriptions.
Unix Timestamp Converter
Convert between Unix epoch timestamps (seconds/milliseconds) and formatted human date-times across timezones.
Color Converter
Convert color codes between HEX, RGB, RGBA, HSL, HSLA, HSV, and CMYK with live swatch previews.
HTML Entity Encoder
Encode and decode reserved HTML characters and emojis into named (&, <) or numeric (&#x;) entities.
SQL Formatter
Format and beautify complex SQL queries with uppercase keywords and standardized indentation.
JSON to Code Generator
Convert JSON schemas and data into strongly-typed C#, TypeScript, Java, Python, Go, Kotlin, and Dart classes.
Markdown Live Editor
Write and preview GitHub-flavored Markdown with live HTML rendering and syntax highlighting.
Diff Checker
Compare two code files or text blocks side-by-side with colored addition and deletion highlights.
Code to Image Generator
Transform code snippets into high-resolution images with macOS window frames and gradient themes.
cURL to Code Converter
Convert cURL commands into clean JavaScript Fetch, Axios, Python Requests, Go, and PHP snippets.
Why Use VecToolz for Developer Tools?
VecToolz provides a comprehensive, browser-based suite of high-performance tools designed specifically for Developer Tools. Whether you need to process files quickly, avoid third-party server exposure, or eliminate expensive subscriptions, our client-side processing architecture delivers instant results with complete data privacy.
Zero Server Uploads
Your files and data are processed entirely inside your browser memory using WebAssembly and HTML5 Canvas APIs.
100% Free Without Watermarks
No subscriptions, no watermarks, and no sign-up forms. Access all tools unlimited times on any device.
Frequently Asked Questions
Common questions about using our free developer tools.