Dev Tools Kit
JSON, Base64, hash, JWT & more
Free · In-App Purchases
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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
This update fixes several bugs and makes the app feel smoother.
Fixes
YAML ↔ JSON: the numbers 0 and 1 were being converted to false / true. Lists written at the same level as their key, trailing comments and Windows line endings are now read correctly, and a version such as 1.10 is no longer turned into 1.1
Color Converter: #RGB and #RRGGBBAA formats are now accepted, and pasting unexpected characters can no longer crash the app
Timestamp: millisecond timestamps (13 digits, like JavaScript's Date.now()) are detected automatically, and dates before 1970 are accepted
Hash Generator: the text is no longer trimmed before hashing, so a trailing newline or space now changes the digest
Text Diff: comparing text with Windows line endings no longer shows phantom blank lines, and very large texts can no longer exhaust memory
HTML Encoder: entity decoding now preserves tags and line breaks, and is instant
HTTP Client: cancelling a request no longer shows an error. A URL without https:// is completed automatically
Base64: decoding now accepts strings split across several lines
JSON Formatter: plain values (123, "text", true) are now accepted
Number Base: the message shown for a value that is too large (beyond 64 bits) is now clear
Smoother
JSON Formatter: syntax highlighting is computed once, so typing and scrolling stay smooth even with large JSON
Regex Tester: expressions are evaluated in the background, so the screen no longer freezes with a heavy expression or a long text
The developer, Kevin Cabon, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Size
- 2.8 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English and French
- Age Rating
16+
- 16+
- Contains
Unrestricted Web Access
User-Generated Content
- In-App Purchases
Yes
- Dev Tools Kit Pro 7,99 €
- Provider
Kevin Cabon
- Kevin Cabon has not identified itself as a trader for this app. If you are a consumer in the European Economic Area, consumer rights do not apply to agreements between you and the provider.
- Copyright
- © Cabon Kevin
