Developer Tools & JSON Editor

Developer Tools & JSON Editor is an 18-in-1 utility suite built for programmers, web developers, and QA engineers. Validate, format, and edit JSON, test regular expressions, generate UUIDs, and reach for 14 more coding tools without switching apps. YOUR CODE STAYS ON YOUR DEVICE Every tool in this app processes your JSON, code, and text locally. Your source code, API payloads, and configuration data are never uploaded to any server, and no account or sign-in is required to use any tool. This app is supported by ads; ad delivery may use standard advertising identifiers, but your actual code and data are never part of that and never leave your device. THE COMPLETE 18-IN-1 DEVELOPER TOOLKIT JSON Validator, Formatter & Editor: paste or edit raw JSON directly in the built-in editor, validate its structure instantly, and format it into readable, indented "pretty" code. Regex Tester: write a regular expression and test it live against sample text to confirm matches before you ship it. UUID Generator: generate version-4 UUIDs on demand for database keys, test fixtures, or config files. Base64 Encoder & Decoder: convert text or data to and from Base64 in one tap. HTML Viewer: render and inspect HTML snippets quickly. XML Beautifier: reformat compact or minified XML into readable, indented markup. URL Encoder & Decoder: percent-encode or decode query strings and URL parameters. MAC Address Formatter: normalize MAC addresses into standard colon or dash notation. Hash Generator: compute MD5, SHA-1, SHA-256, and SHA-512 hashes for any text input. JavaScript Tester: run quick JavaScript snippets to check logic before pasting it into your project. HTTP Header Viewer: inspect and format HTTP header key-value pairs. Network Packet Size Calculator: estimate packet overhead and payload sizes for network planning. Log Viewer: paste raw log output into a cleaner, more readable view. Clipboard Manager: keep a short history of copied text snippets while you work. App Info Viewer: check package name, version, and permissions for apps installed on your device. Color Converter: convert between HEX, RGB, and HSL color values. Timestamp Converter: convert Unix timestamps to human-readable dates and back. Text Diff Tool: compare two blocks of text and highlight what changed line by line. WHO THIS IS FOR 1. Backend Engineers: validate and format JSON API responses without opening a laptop. 2. Frontend Developers: convert colors, test regex patterns, and diff text on the go. 3. QA Testers: check hash values, decode Base64 payloads, and inspect HTTP headers during a test session. 4. Students & Bootcamp Learners: a lightweight reference for everyday encoding, hashing, and formatting tasks. WHY A DEDICATED DEVELOPER TOOLKIT Switching between a dozen single-purpose web tools just to validate a JSON response or decode a Base64 string wastes time, and many of those sites are unusable without a stable connection. This app bundles the 18 checks developers reach for most often into one lightweight, ad-supported app that keeps working on a plane, on the train, or anywhere your data connection drops. COMMON QUESTIONS Does this app need an internet connection? No. Every developer tool works fully offline; only ad delivery needs a network connection. Can I edit JSON, not just validate it? Yes. The JSON tool includes a built-in text editor for pasting, editing, and reformatting JSON, alongside validation and pretty-printing. Is my code or data uploaded anywhere? No. All processing for every tool happens locally on your device. Do I need an account? No account or registration is required for any tool. Is this a full code editor or IDE? No. This is a lightweight utility toolkit for quick checks, conversions, and formatting, not a replacement for a full IDE. Download Developer Tools & JSON Editor and keep 18 essential coding utilities in your pocket, ready whenever you need a quick JSON check, regex test, or hash lookup.