toolscoder.com
A growing collection of free, instant, browser-based developer tools. No sign-up, no personal tracking.
Developer Tools
Browse all →JSON Formatter
Format, validate, and minify JSON instantly in your browser.
Try it →UUID Generator
Generate cryptographically random UUID v4 values — single or bulk, instantly in your browser.
Try it →JWT Decoder
Decode and inspect JWT tokens — view header, payload, and expiry status. No server, no data sent anywhere.
Try it →Regex Tester
Test JavaScript regular expressions with live match highlighting, capture group table, and flag toggles.
Try it →JSON to TypeScript
Convert a JSON sample into TypeScript interface declarations — nested objects, arrays, and null handled automatically.
Try it →JSON to Go
Convert a JSON sample into Go struct definitions — nested objects, arrays, and json struct tags generated automatically.
Try it →Cron Expression Generator
Build cron expressions with presets or custom fields — get an instant plain-English description and copyable crontab syntax.
Try it →Encoding & Conversion Tools
Browse all →Base64 Converter
Encode and decode text to and from Base64 format instantly.
Try it →Binary Converter
Convert text, decimal, and hexadecimal to binary and back instantly.
Try it →URL Encoder / Decoder
Encode text to percent-encoded URL format or decode URL-encoded strings back to plain text.
Try it →Number Base Converter
Convert numbers between binary, octal, decimal, hex, and any base from 2 to 36.
Try it →Data & Formatting Tools
Browse all →SEO Tools
Browse all →URL Slug Generator
Convert any title or phrase into a clean, SEO-friendly URL slug — accents normalized, special characters removed.
Try it →Google SERP Preview
Preview how your page title, meta description, and URL will appear in Google search results. Character counters with truncation warnings.
Try it →Meta Tag Generator
Generate <title>, meta description, canonical, Open Graph, and Twitter Card HTML tags from your page details — ready to paste into your <head>.
Try it →Canonical Tag Generator
Generate a <link rel="canonical"> tag from any URL — strip tracking parameters, normalize protocol and "www." automatically.
Try it →About
- All tools run entirely in your browser — nothing is sent to a server.
- Pick a tool from the nav or the cards above to get started.