Developer Tools
Format, encode, decode, and convert common developer data. 100% free, browser-based execution with no server uploads, no watermarks, and instant results.
Available Developer Tools (31)
Select any tool below to start immediately without signup or downloads.
JSON Formatter / Validator
Format JSON and validate syntax safely in the browser.
JSON Compare
Compare two JSON values and find field-level differences.
JSON Minifier
Validate JSON and remove unnecessary whitespace.
HTML Formatter
Format common HTML snippets into readable markup.
CSS Minifier
Minify CSS by removing comments and extra whitespace.
JS Minifier
Minify simple JavaScript snippets in the browser.
SQL Formatter
Format common SQL queries with readable line breaks.
Hash Generator
Generate SHA hashes for text or local files.
Regex Tester
Test JavaScript regular expressions against text.
JWT Decoder
Decode JWT header and payload without uploading tokens.
URL Encode / Decode
Encode or decode URL components with safe error handling.
Base64 Encode / Decode
Encode and decode Base64 text with Unicode support.
Unix Timestamp Converter
Convert Unix timestamps, local dates, UTC, and ISO strings.
CSV to JSON / JSON to CSV
Convert CSV data to JSON and JSON to CSV with live table preview and delimiter controls.
Text & Code Diff Checker
Compare two text or code files side-by-side with visual line and character change highlighting.
cURL to Code Converter
Convert cURL commands to JavaScript Fetch, Axios, Python Requests, Go, and PHP snippets.
Cron Expression Generator
Create and explain 5-field cron schedules with human-readable descriptions and upcoming run times.
Chmod Permissions Calculator
Calculate Linux file permissions in octal (755, 644) and symbolic format with interactive checkboxes.
Subnet & CIDR IP Calculator
Calculate network address, broadcast IP, usable host range, and wildcard mask from CIDR notation.
CSS Glassmorphism & Frosted Glass Generator
Create modern frosted glass UI components with real-time blur, opacity, shadow, and border controls. Export clean CSS and Tailwind.
JSON to TypeScript Interface Generator
Convert JSON payloads into clean, idiomatic TypeScript interfaces, types, and nested models automatically in your browser.
Audio Trimmer & Ringtone Cutter
Cut and trim MP3, WAV, and audio files directly in your browser with interactive waveform visualization. 100% private, zero server uploads.
Markdown to HTML & PDF Converter
Live split-screen Markdown editor with real-time HTML preview, word count, 1-click HTML copy, and direct PDF printing. 100% in-browser.
CSS Box Shadow & Layered Shadow Generator
Create smooth multi-layer CSS box shadows with interactive sliders for blur, spread, offset, and opacity. Export clean CSS and Tailwind.
YAML to JSON & JSON to YAML Converter
Convert YAML to JSON or JSON to YAML in your browser. Parses nested objects, lists, booleans, and strings with instant syntax formatting.
HTML to Markdown Converter
Convert raw HTML or rich-text snippets into clean GitHub-Flavored Markdown (GFM) with support for headings, tables, links, and code blocks.
Slug & URL String Generator
Transform any title, product name, or phrase into a clean, lowercase, and search-engine-friendly URL slug with custom separators.
HTTP Status Code Lookup & Reference
Search and explore every HTTP response code defined in IETF RFC specifications, understand underlying causes, and view actionable developer solutions.
User-Agent Parser & Device Inspector
Inspect your current client environment or parse any arbitrary User-Agent string to extract browser engine, OS version, and device metrics.
Client-Side File Encryptor & Decryptor
Protect confidential documents, spreadsheets, and archives using native browser AES-256-GCM encryption. Zero bytes leave your device.
HMAC Generator & Signature Tool
Compute Hash-based Message Authentication Codes (HMAC) using cryptographic algorithms including HMAC-SHA256 and HMAC-SHA512 directly in your browser.
Practical Guides & Tutorials for Developer Tools
JSON Formatting, Validation, and Debugging Handbook
A developer handbook covering common JSON syntax errors, trailing commas, quote escaping, and how to safely format confidential payloads inside your browser.
Read tutorial →4 min readHow to Compare JSON Objects and Detect Breaking API Schema Changes
A guide to structural JSON comparison and semantic diffing. Compare API responses, detect breaking schema changes, and isolate field differences.
Read tutorial →3 min readHow to Minify JSON Payloads for Fast Network Transfer
Learn how to compress JSON payloads by stripping whitespace and comments. Free in-browser JSON minifier.
Read tutorial →4 min readHow to Convert CSV Spreadsheets to JSON and JSON to CSV
Learn how to convert tabular CSV data to JSON and vice-versa. Includes custom delimiter controls, header mapping, and live preview table.
Read tutorial →6 min readAuto-Generating TypeScript Interfaces from JSON Payloads: API Type Safety Guide
A complete developer guide to converting JSON payloads into TypeScript interfaces. Learn AST type inference, union types, optional field handling, and runtime Zod validation.
Read tutorial →6 min readYAML vs. JSON: Key Differences, Formatting Rules & How to Convert Online
A comprehensive guide exploring YAML vs JSON formatting rules, hierarchy, syntax validation, and client-side conversion for Kubernetes and REST APIs.
Read tutorial →Frequently Asked Questions About Developer Tools
Is it safe to paste private JSON or API payloads with keys?
Yes. Zero network requests are made. Everything parses in your local V8 JavaScript runtime, completely offline-safe.
Can the JSON validator pinpoint exact error locations?
Yes. It gives you the exact line number, column index, and expected character token for syntax issues.