Developer Tools Collection
A curated set of essential tools for developers
DocBin
A simple and shareable Notion-like note.
JSON Prettifier
Format and beautify your JSON data with syntax highlighting
Prompt Composer
Build prompts with variables and live token counts
Token Chunker
Split text or code into token-sized chunks
JSON Converter Hub
Convert JSON to/from YAML, XML, and CSV formats with bidirectional support
Hash Generator
Generate MD2, MD4, MD5, and SHA family hashes
Base64 Encoder/Decoder
Easily encode and decode Base64 strings
Epoch → Datetime Converter
Convert Unix epoch seconds to ISO 8601 and multiple timezones
URL Encoder/Decoder
Encode and decode URL components
HMAC Generator
Generate HMAC signatures using SHA-1, SHA-256, SHA-384, or SHA-512
Image Watermark Utility
Add a draggable, color-customizable watermark to images and download.
Social Image Generator
Generate social/OG images with presets for Dev.to, Twitter, LinkedIn
JSON to Golang Struct
Convert JSON into Go structs with json tags
Markdown Preview
Live preview Markdown with Monaco editor support
JSON to Python Class
Convert JSON into Python dataclasses with type hints
QR Code Generator
Create QR codes with custom colors, optional logo, and download PNG/SVG
Token Counter (OpenAI)
Count tokens for OpenAI models using cl100k_base encoding
Color Palette Builder
Create accessible color palettes with WCAG contrast checking
Image Compressor & Resizer
Compress and resize images client-side with quality and format options
PDF Merge & Split
Merge multiple PDFs or split pages from a PDF, all in-browser
Swagger/OpenAPI Viewer
View OpenAPI specs (JSON or YAML) client-side
YouTube Embed
Embed YouTube videos with custom options
Pomodoro Timer
Manage your work sessions with the Pomodoro Technique
More Tools Coming Soon
We're constantly adding new developer tools to make your workflow easier