Dev Tools Kit

Dev Tools Kit is a handy toolbox for developers.

Stop jumping between websites to format JSON, decode Base64 or test a regex.

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FREE TOOLS
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• JSON Formatter – Pretty-print or minify JSON.
• Base64 – Encode and decode strings.
• UUID Generator – Generate random UUID v4.
• String Case – Convert text to camelCase, snake_case, kebab-case, Title Case, and more.
• Number Base – Convert between binary, octal, decimal and hex.
• HTML Encoder – Encode and decode HTML entities.
• Password Generator – Generate secure random passwords.
• Chmod Calculator – Build Unix permission strings with a visual editor.
• QR Code Generator – Turn any text or URL into a QR code.
• Text Statistics – Count characters, words, sentences, reading time, and more.
• URL Parser – Break a URL down into scheme, host, port, path, query and fragment.

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PRO TOOLS (one-time purchase)
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• Regex Tester – Test and debug regular expressions on sample text.
• URL Encoder – Encode / decode URLs.
• Timestamp – Convert timestamps to readable dates and back, in any timezone.
• Hash Generator – Compute MD5, SHA-1 and SHA-256.
• JWT Decoder – Inspect JSON Web Tokens in a readable format.
• Text Diff – Compare two texts line by line, or word by word.
• Color Converter – Convert colors between HEX, RGB, HSL and Swift Color(…).
• Lorem Ipsum – Generate placeholder text by words, sentences or paragraphs.
• CRON Parser / Builder – Read and compose CRON expressions with a visual editor.
• CSV ↔ JSON – Convert between CSV and JSON formats.
• YAML ↔ JSON – Convert between YAML and JSON, direction auto-detected.
• JWT Builder – Build and sign JWT tokens (HS256/HS384/HS512).
• Token Counter – Estimate token counts for today's leading AI models (GPT, Claude, Gemini, Llama, Mistral, xAI, DeepSeek).
• SQL Formatter – Format and indent SQL queries, with syntax-highlighted output.
• HTTP Client – Send GET/POST/PUT/PATCH/DELETE requests with an auth assistant and a built-in status code reference.

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DESIGNED FOR DEVELOPERS
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• Search, pin favorites, and reorder tools to fit your workflow.
• Share text from any app directly into a tool via the Share Extension.
• Clean, fast interface — inputs are remembered between sessions.
• Input history (Pro) – Reuse your last 10 values, pasted or typed, in every tool.
• 100% offline — nothing is sent to any server.
• One-time purchase, no subscriptions.
• Future Pro tools included in the price.

Dev Tools Kit is the small utility app you open dozens of times a week while coding, debugging or reviewing data.