Your Instant Developer Toolkit
100% Client-side. Lightning fast. No data leaves your machine.
Base64 Encoder
Instantly encode and decode Base64 strings safely in your browser.
JSON Formatter
Format, validate, and minify your JSON payloads instantly.
JWT Decoder
Decode and inspect JSON Web Tokens strictly offline.
Hash Generator
Compute MD5, SHA-1, and SHA-256 cryptographic hashes instantly.
URL Encoder
Safely encode and decode URI components and query strings.
UUID Generator
Generate 1 to 100 secure, random v4 UUIDs locally.
CRON Parser
Instantly translate tricky CRON schedules into plain English.
Color Converter
Instantly translate CSS colors between HEX, RGB, and HSL.
Lorem Ipsum
Instantly generate customized placeholder text boundaries.
Markdown Viewer
A real-time, side-by-side markdown renderer layout.
Epoch to ISO
Convert Unix seconds or milliseconds into ISO and readable dates instantly.
Timezone Converter
Translate date-times between IANA zones like America/New_York offline.
ISO Repeat Utility
Parse and build ISO 8601 durations and repeating interval strings quickly.
GPT Tokenizer
Mathematically compute BPE tokens in real-time instantly without API calls.
JSON Schema Builder
Convert basic JSON properties logically into strict API schemas natively.
Chat Formatter
Compile human scripts strictly into valid OpenAI conversation arrays.
Similarity Calculator
Derive mathematically strict cosine similarities comparing LLM arrays.
Prompt Tester
Mock parameter variables dynamically verifying context blocks intuitively.