DevBuddy: Offline Dev Toolkit

DevBuddy is an offline developer toolkit with 27 utilities for everyday coding, debugging, and API work. No accounts, no cloud round-trips. Everything runs on your phone. WHY OFFLINE - Paste sensitive tokens, payloads, and secrets without sending them anywhere - Works on flights, in tunnels, behind strict firewalls - Nothing logs, nothing syncs, nothing leaves the device WHAT'S INSIDE — 27 TOOLS Formatters - JSON formatter and validator - XML formatter - SQL formatter - Markdown preview - Diff tool with line-level compare Encoders and Decoders - Base64 encoder and decoder - URL encoder and decoder - HTML entity encoder and decoder - JWT decoder (header, payload, signature) - Markdown to JSON - API payload explorer Generators - UUID generator (v1, v4) - Hash generator (MD5, SHA-1, SHA-256, SHA-512) - QR code generator - Lorem ipsum generator - Prompt template builder Converters - Unix timestamp converter (epoch, ISO, human-readable) - Color picker (HEX, RGB, HSL) - Number base converter (binary, octal, decimal, hex) - YAML to JSON converter - Text chunker for prompts and RAG workflows Testers - Regex tester with live match groups - Token counter - AI safety checker Security - TOTP tester for 2FA codes - AES encrypt and decrypt - HMAC generator and verifier MADE FOR - Developers and software engineers - QA engineers and API testers - DevOps and SREs on call - Students learning JSON, regex, JWT, hashes - Technical writers and prompt engineers COMMON TASKS - Pretty print and validate a JSON response - Decode a JWT to inspect claims and expiry - Test a regex against sample input with live highlighting - Generate a UUID or strong hash for a quick script - Convert a Unix timestamp during incident triage - Encode or decode base64, URLs, and HTML entities - Format SQL or XML before pasting into a ticket or PR - Generate a QR code from any text or URL - Verify a TOTP code against a shared secret - Encrypt or decrypt text with AES, sign with HMAC DARK MODE DevBuddy runs in dark mode by default and follows your system theme. LANGUAGES Available in 14 languages: English, Hindi, Spanish, French, German, Portuguese, Arabic, Bengali, Indonesian, Japanese, Korean, Russian, Turkish, and Chinese. PRIVACY DevBuddy does not collect your inputs. Every tool runs locally on your device. No telemetry on tool content.