Dev Tools
JSON formatters, JWT decoders, regex builders, hash generators — daily-driver developer utilities.
Overview
Developers reach for the same handful of tools every day: format some JSON, decode a token, build a regex, hash a string. Most existing web tools for these tasks are ad-heavy, slow, or worse — they upload your input. This category is the opposite: fast, ad-light (eventually ad-free where possible), and everything runs in your browser.
Common Use Cases
- →Inspect API responses (JSON formatter, JWT decoder).
- →Build and test regular expressions with live match highlighting.
- →Compute file hashes for integrity checks (SHA-256 verification).
- →Generate boilerplate (Lorem ipsum, UUIDs, robots.txt, sitemaps).
Frequently Asked Questions
Do these tools work offline?
Once loaded, yes — everything runs client-side. We don't currently ship a service worker for full offline, but a single page handles its work without any network calls after initial load.
Are my pasted secrets safe?
Yes — never uploaded anywhere. JWTs, hashes, and JSON inputs stay in your browser. The tool boundary is your machine. Cross-check by opening dev tools' Network panel after pasting.
Can I bookmark with input pre-filled?
Most simple tools don't encode state in the URL (for privacy), but some larger tools support shareable URL state. Check the tool's options menu.
JSON to TypeScript
Convert JSON objects to TypeScript interfaces instantly.
Markdown Studio
Real-time Markdown editor with live preview and export.
CSV to JSON Converter
Quickly convert CSV data to JSON format.
UUID Generator
Generate unique UUID v4 identifiers instantly.
base64
sql-formatter
Robots.txt Generator
Create a robots.txt file to control how search engines crawl your website.
Robots.txt Generator
Create robots.txt files to control search engine crawlers.
.htaccess Generator
Generate .htaccess rules for redirects, security headers, and more.
Dockerfile Generator
Generate production-ready Dockerfiles for common project types.
Cron Schedule Generator
Generate and validate cron expressions visually.
Unix Time Conv
Convert Epoch timestamps to human dates instantly.
IP Subnet Calculator
Calculate network address, broadcast, subnet mask and usable IPs.
Subnet Calculator
Plan and calculate IP subnets, masks, and ranges.
JWT Decoder
Decode and inspect JSON Web Tokens safely.
Favicon Generator
Create favicons from images for your website.
User Agent Parser
Analyze and decode browser user agent strings.
URL Encoder/Decoder
Safely encode or decode URL components.
Key Code Viewer
Detect and display JavaScript keyboard event codes.
Text Diff Checker
Compare two pieces of text to find differences.
Regex Builder
Build and test regular expressions visually.
Binary Translator
Convert text to binary code and binary to text instantly.
Password Generator
Create secure, random passwords instantly.
Lorem Ipsum Generator
Create dummy text for layouts and designs.
Binary Translator
Convert text to binary code and binary to text instantly.
ASCII Art Generator
Convert text to ASCII art.
Meta Tag Generator
Generate SEO-friendly meta tags for your website. Preview and copy in one click.
Open Graph Generator
Create Open Graph meta tags for better social media previews.
Robots.txt Generator
Create a robots.txt file to control how search engines crawl your website.
What Is My IP
Find your public IP address and location information instantly.
Slug Generator
Convert text into URL-friendly slugs for SEO and web development.
Advanced Word Counter
Get detailed statistics including readability, keyword density and more.
Character Counter
Simple and fast character counting tool for social media and SEO.
case-converter-plus
Convert text between various case styles.
JSON Minifier
Compress and minify JSON data to reduce file size.
JSON Formatter & Validator
Beautify, format, validate, and minify your JSON code.
CSS Animation Generator
Visually design CSS keyframe animations and generate ready-to-use code instantly.