Developer & Webmaster Tools
The Developer & Webmaster Tools collection on morrisfreetools provides free, privacy-first browser utilities and calculators built by Anthony Morris. All calculations, format conversions, and data processing execute locally in your web browser memory using JavaScript and WebAssembly, guaranteeing zero server uploads and complete privacy.
⚡ Which Developer & Webmaster Tools tools are available for instant use?
JSON Formatter, Validator & Tree Beautifier
Prettify, minify, validate syntax errors with line numbers, and inspect nested objects in a clean tree view.
CSS Minifier & Beautifier (Code Compressor)
Compress CSS styles to reduce web asset file sizes or format messy stylesheet code into clean indented rules.
Base64 Encoder & Decoder (Text & Data URLs)
Encode plain text and UTF-8 strings into Base64 format or decode Base64 data with zero latency.
URL Encoder & Decoder (Percent-Encoding)
Encode special query parameter characters into safe percent-encoded URLs or decode escaped query strings.
Regex Tester & Regular Expression Explainer
Test JavaScript and PCRE regular expressions in real-time with capture groups, replacement previews, and flags (g, i, m).
UUID & GUID Generator (v4 Cryptographically Secure)
Generate single or bulk RFC 4122 compliant version 4 UUIDs using window.crypto CSPRNG with uppercase/hyphen options.
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Compute cryptographic hashes (SHA-256, SHA-512, SHA-384, SHA-1, MD5) for passwords, strings, and checksums.
Markdown to HTML Converter & Live Previewer
Convert GitHub Flavored Markdown (GFM) headings, tables, code blocks, and checklists into clean HTML with one-click copy.
Cron Expression Generator & Human Explainer
Build cron schedule strings (minute, hour, day, month, weekday), translate expressions into plain English, and view upcoming trigger runs.
Color Picker & Converter (HEX, RGB, HSL, CMYK)
Pick colors visually or convert between HEX, RGB, RGBA, HSL, HSLA, CMYK, CSS color names, with contrast ratio tester.
HTML Entity Encoder & Decoder (Special Characters)
Escape HTML tags, brackets, quotes, ampersands, and unicode characters into named/numeric entities or decode back to raw text.
JWT Decoder & Token Payload Inspector (JSON Web Token)
Decode JSON Web Tokens (JWT) locally: inspect header, payload claims, expiration timestamps (exp, iat), and signature status.
JavaScript Minifier & Beautifier (JS Compressor)
Minify JavaScript to eliminate whitespace and comments for production or format obfuscated scripts with clean indentation.
Placeholder Image Generator (Client-Side Canvas)
Create custom dimensions placeholder images (PNG/JPG/SVG/Data URI) with custom text, colors, and instant download.
Frequently asked questions about Developer & Webmaster Tools
Q. What tools are in the Developer & Webmaster Tools category? ▼
The Developer & Webmaster Tools collection on morrisfreetools includes 14 browser-native utility tools for instant calculation and processing.
Q. Are all Developer & Webmaster Tools tools private and client-side? ▼
Yes, every tool in Developer & Webmaster Tools runs 100% locally in your browser with zero data sent to external servers.
Q. Who developed these Developer & Webmaster Tools tools? ▼
All utilities were built and maintained by Anthony Morris.
Q. Is there any cost or subscription to use Developer & Webmaster Tools tools? ▼
No, all Developer & Webmaster Tools tools are 100% free with unlimited usage.
Who built these Developer & Webmaster Tools and how is client-side privacy guaranteed?
Authored by Anthony Morris • Creator & Project Lead • Published: August 25, 2026 • Updated: August 27, 2026
Anthony Morris founded and created morrisfreetools to provide fast, 100% client-side online calculators and utilities. Every single tool runs locally in your device's browser memory via WebAssembly and JavaScript, guaranteeing that no personal data, health metrics, text, or files are ever stored, uploaded, or tracked.