Developer Tools.

Cron Expression Builder

Build, edit, and translate cron schedules into plain English with live execution forecasts.

Linux chmod Calculator

Calculate octal (755, 644) and symbolic permissions with an interactive matrix and shell command generator.

IP Subnet Calculator

Calculate network IP ranges, subnet masks, broadcast addresses, and usable host ranges quickly.

LLM GPU VRAM Calculator

Calculate required GPU VRAM, KV cache, and quantization fit across DeepSeek 4, Llama 4/3.3, and Qwen 2.5.

Unix Timestamp Converter

Convert epoch seconds and milliseconds to human dates, UTC, ISO 8601, and generate timestamps.

CSV ↔ JSON & Markdown

Convert spreadsheets, JSON data structures, and GitHub Markdown tables bidirectionally.

Text & Code Diff Viewer

Compare two texts or code snippets side-by-side or unified with color-coded syntax additions and deletions.

Regex Tester & Visualizer

Test and evaluate JavaScript regular expressions in real-time with capture group extraction and cheat sheets.

Word Counter

Quickly count words, characters, sentences, and paragraphs for your essays or documentation.

Markdown Editor & Live Preview

Write, preview, and format GitHub Flavored Markdown with real-time DOM rendering, stats, and HTML export.

LLM Token Counter

Calculate tokens, inspect subwords, and benchmark context limits across frontier models (DeepSeek 4, Claude Sonnet 5, Opus 5, GPT Sol, GPT-6 Astra).

JSON Formatter & Validator

Format, beautify, and validate your JSON data instantly. Ensure your code is flawless and readable.

YAML Formatter & Validator

Format, beautify, and validate your YAML (or JSON) data instantly. Ensure your configuration is flawless.

XML Formatter

Format, beautify, and validate your XML data blocks seamlessly ensuring syntax integrity.

SQL Query Formatter

Format, beautify, and standardize your SQL queries across multiple SQL dialects right in your browser.

HTTP Status & Headers

Search and inspect HTTP response status codes (1xx-5xx) and security headers with developer explanations.

JWT Decoder & Inspector

Decode, verify, and generate JSON Web Tokens (JWT). Parse header and payload data securely.

Base64 Converter

Easily encode text or data to Base64 format, or decode Base64 strings back to their original form.

Unicode Converter

Convert text bi-directionally between raw text, Hex, Decimal, HTML entities, and URL encodings.

URL Encoder & Decoder

Quickly encode text to a URL-safe format or decode URL strings back to readable human text natively.

QR Code Generator

Generate clean, scalable, and high-quality QR codes directly in your browser. Download as SVG easily.

Website SSL Checker

Check live SSL/TLS certificate validity, expiration countdown, SANs, and DNS CAA records for any website.

SSL / X.509 Decoder

Inspect X.509 PEM certificates, CSRs, expiration dates, SANs, and issuer details locally in your browser.

Strong Password Generator

Generate strong, secure, and random passwords customized to your required length and character types.

Hash Generator (MD5/SHA)

Generate secure MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input directly in your browser.

UUID / GUID Generator

Generate unique, universally compatible Version 4 UUIDs (GUIDs) securely entirely client-side.

Bcrypt Hash & Verifier

Generate secure bcrypt hash passwords or verify them against an existing hash locally in your browser.