36 tools · 1 file each · 0 dependencies

One tool. One file. Open and use.

A growing collection of developer tools, resume themes, and portfolio templates — each a single, self-contained HTML file. No build step. No dependencies. No frameworks.

~/tools

One File Tools

Generators, validators, and utilities — every one a single HTML file you can open straight from disk. Search by name, description, or tag.

36 tools

Animation Cubic-Bezier Editor

CSS Tools

Visually create and customize CSS cubic-bezier() easing functions with a live animation preview.

tools/animation-cubic-bezier-editor.html

EasyOpen Live

Aspect Ratio Calculator

Image Tools

Calculate and simplify aspect ratios instantly. Supports common presets and outputs decimal ratio and CSS padding-bottom values.

tools/aspect-ratio-calculator.html

EasyOpen Live

Box Shadow Generator

CSS Tools

Design CSS box shadows visually with live preview, presets, and copy-ready output.

tools/box-shadow-generator.html

EasyOpen Live

Clip Path Generator

CSS Tools

Visually create complex CSS clip-path shapes and instantly copy the generated code.

tools/clip-path-generator.html

MediumOpen Live

Color Palette Extractor

Image Tools

Extract dominant colors and generate beautiful palettes directly from images in your browser.

tools/color-palette-extractor.html

MediumOpen Live

Command Step Loader

Developer Utilities

Load multiple commands and copy them one at a time with a terminal-style interface.

tools/command-step-loader.html

EasyOpen Live

Cron Expression Builder

Developer Utilities

Build and customize cron schedules with presets, validation, explanations, and upcoming run previews.

tools/cron-expression-builder.html

MediumOpen Live

CSS Color Converter

Color Tools

Convert between Hex, RGB, HSL, HSLA, and OKLCH color formats instantly with a visual picker.

tools/css-color-converter.html

EasyOpen Live

CSS Grid Generator

CSS Tools

Build CSS Grid layouts visually with configurable columns, rows, gap, and sizing options.

tools/css-grid-generator.html

MediumOpen Live

CSS Unit Converter

CSS Tools

Instantly convert between px, rem, em, vw, vh, and percentages.

tools/css-unit-converter.html

MediumOpen Live

Favicon Generator

Developer Utilities

Generate a complete favicon pack and integration tags from any image, offline.

tools/favicon-generator.html

EasyOpen Live

Flexbox Playground

CSS Tools

Experiment with Flexbox properties visually and copy the generated CSS.

tools/flexbox-playground.html

MediumOpen Live

Git Ignore Generator

Developer Utilities

Generate boilerplate .gitignore files for various technologies instantly, offline.

tools/git-ignore-generator.html

EasyOpen Live

GitHub Token Validator (Terminal)

Developer Utilities

Validate GitHub Personal Access Tokens with a terminal-style UI that displays user identity and scopes.

tools/github-token-validator-terminal.html

EasyOpen Live

GitHub Token Validator Plain

Developer Utilities

Validate GitHub Personal Access Tokens with a clean, straightforward interface.

tools/github-token-validator-plain.html

EasyOpen Live

GitHub Token Validator Retro

Developer Utilities

Validate GitHub Personal Access Tokens with a retro terminal themed interface.

tools/github-token-validator-retro.html

EasyOpen Live

Glassmorphism Generator

CSS Tools

Generate sleek, frosted-glass UI effects for your components.

tools/glassmorphism-generator.html

EasyOpen Live

JSON Diff Viewer

JSON & API

Compare two JSON objects semantically with added, removed, and modified value highlighting.

tools/json-diff-viewer.html

MediumOpen Live

JSON Formatter

JSON & API

Format, validate, and minify JSON locally in your browser.

tools/json-formatter.html

EasyOpen Live

JSON-LD / Schema.org Generator

Web & SEO

Generate Schema.org JSON-LD structured data with live preview, copy, and download support.

tools/jsonld-schema-generator.html

MediumOpen Live

JWT Decoder

JSON & API

Decode and inspect JSON Web Tokens — header, payload, claims, and expiry — entirely in your browser.

tools/jwt-decoder.html

EasyOpen Live

Lorem Ipsum Generator

Text & Content

Generate placeholder lorem ipsum text for designs and mockups.

tools/lorem-ipsum-generator.html

EasyOpen Live

Meta Tag Generator

Web & SEO

Generate essential HTML meta tags with a live preview and copy-ready code.

tools/meta-tag-generator.html

EasyOpen Live

Neumorphism Generator

CSS Tools

Create soft, extruded UI elements with customizable neumorphic shadows.

tools/neumorphism-generator.html

EasyOpen Live

Open Graph Checker

Web & SEO

Validate Open Graph tags from any public URL with social previews, health score, and JSON export.

tools/open-graph-checker.html

MediumOpen Live

Open Graph Generator

Web & SEO

Generate Open Graph meta tags with a live tri-platform preview (Facebook, Twitter, LinkedIn) and copy-ready HTML.

tools/open-graph-generator.html

EasyOpen Live

Open Graph Inspector

Web & SEO

Analyze meta tags, social previews, and SEO metadata for any URL with actionable scores.

tools/open-graph-inspector.html

MediumOpen Live

Palette Generator

Color Tools

Generate unique, collision-free variation color schemes based on color theory metrics, offline.

tools/palette-generator.html

MediumOpen Live

Password Generator

Developer Utilities

Generate highly secure, cryptographic random passwords instantly. 100% offline, privacy guaranteed.

tools/password-generator.html

EasyOpen Live

QR Code Generator

Developer Utilities

Instantly generate customizable, high-quality QR codes offline.

tools/qr-code-generator.html

EasyOpen Live

Radii - Border Radius Generator

CSS Tools

Visually create CSS border-radius values with live preview, presets, and copy-ready CSS output.

tools/border-radius-generator.html

EasyOpen Live

Responsive Breakpoint Tester

Web & SEO

Test responsive layouts instantly via URL or raw HTML sandbox with intelligent scaling.

tools/responsive-breakpoint-tester.html

MediumOpen Live

Robots.txt Generator

Web & SEO

Visually build, manage, and export standard-compliant robots.txt files with live syntax highlighting.

tools/robots-txt-generator.html

EasyOpen Live

Sitemap Generator

Web & SEO

A standalone Sitemap Generator that helps users create valid XML sitemaps for websites entirely offline.

tools/sitemap-generator.html

MediumOpen Live

Twitter / X Card Preview

Web & SEO

Preview how Twitter/X cards appear with live updates for Summary and Summary Large Image layouts.

tools/twitter-x-card-preview.html

EasyOpen Live

UUID Generator

Developer Utilities

Generate random v4 UUIDs instantly, offline.

tools/uuid-generator.html

EasyOpen Live

Want to see your tool here? Check the contributing guide and submit a PR.

Contributing Guide

~/resume

One File Resume

ATS-friendly resume themes generated from a single JSON file. Zero JavaScript, A4 print-ready.

Classic

resume/themes/classic.html

Clean single-column layout. ATS-compliant, zero JavaScript, A4 print-ready. System fonts only.

Preview

All resume themes are generated from profile.json — edit your data once, get every theme.

~/portfolio

One File Portfolio

Developer portfolio themes generated from a single JSON file. Dark/light mode, responsive.

Developer

portfolio/themes/developer.html

Dark developer-focused portfolio with project cards, skills grid, experience timeline, and testimonials.

Preview

All portfolio themes are generated from profile.json — edit your data once, get every theme.