Choose a tool. Get it done.
Fast utilities for AI prompting and everyday web development. Each tool has its own focused page. Most tools process data locally; the website auditor checks public URLs through our server.
Useful tools across the development workflow
Format data, improve interfaces, inspect security-related values, and handle repetitive text tasks without sending content away.
Data formatting
Work with JSON, CSV, Base64, URLs, and timestamps.
CSS and design
Create gradients, shadows, color combinations, and interface details.
Security and privacy
Generate passwords, inspect tokens, and create secure hashes locally.
Text productivity
Extract, count, convert, encode, and prepare text efficiently.
JSON Formatter & Validator
Format, minify, and validate JSON instantly in your browser.
Open tool →CSS Gradient Generator
Build a polished linear gradient and copy production-ready CSS.
Open tool →Unix Timestamp Converter
Convert Unix timestamps to readable dates and back again.
Open tool →Text Case Converter
Convert text to title, sentence, camel, kebab, snake, or uppercase.
Open tool →Regex Tester
Test regular expressions and inspect every match without sending data away.
Open tool →Color Contrast Checker
Check WCAG contrast ratios for text and background colors.
Open tool →URL Encoder & Decoder
Safely encode or decode URLs, query values, and text fragments.
Open tool →Base64 Encoder & Decoder
Encode plain text to Base64 or decode Base64 back to text.
Open tool →Word & Character Counter
Measure words, characters, sentences, lines, and reading time.
Open tool →SEO Meta Tag Generator
Create essential title, description, canonical, and social meta tags.
Open tool →CSS Box Shadow Generator
Design polished shadows with live controls and copyable CSS.
Open tool →Secure Password Generator
Generate strong passwords locally using browser cryptography.
Open tool →Email Extractor
Find, clean, deduplicate, sort, copy, and download email addresses from pasted text.
Open tool →UUID Generator
Generate one or many cryptographically random UUID v4 identifiers in your browser.
Open tool →Hash Generator
Create SHA-256, SHA-384, or SHA-512 hashes from text using the Web Crypto API.
Open tool →JWT Decoder
Inspect JWT header and payload data locally without uploading or verifying the token.
Open tool →JSON to CSV Converter
Convert arrays of JSON objects into clean downloadable CSV data.
Open tool →HTML Entity Encoder & Decoder
Encode text safely for HTML or decode HTML entities back into readable text.
Open tool →CSS Formatter & Minifier
Beautify readable CSS or remove unnecessary whitespace for production use.
Open tool →URL Parser & Query Inspector
Break a URL into its protocol, host, path, query parameters, and fragment.
Open tool →URL Slug Generator
Turn titles and phrases into clean SEO-friendly URL slugs.
Open tool →Aspect Ratio Calculator
Calculate image and video dimensions while preserving the original aspect ratio.
Open tool →CSS Grid Builder
Build responsive auto-fit or fixed-column grids with a resizable preview and ready-to-copy CSS.
Open tool →Flexbox Layout Builder
Explore alignment, wrapping, direction, and spacing with a live Flexbox layout preview.
Open tool →Fluid Typography Calculator
Generate CSS clamp() font sizes that scale smoothly between your chosen viewport widths.
Open tool →CSS Spacing Scale Generator
Create consistent linear or geometric spacing tokens for margins, padding, and gaps.
Open tool →Color Palette & Shades Generator
Turn a brand color into ten useful tints and shades with exportable CSS variables.
Open tool →Image Resizer & Compressor
Resize and compress JPEG, PNG, and WebP images locally, preview the result, and download.
Open tool →SVG to CSS Background Converter
Encode SVG artwork as a CSS background-image data URL without uploading your source.
Open tool →Placeholder Text Generator
Generate paragraphs, sentences, or an exact word count for layouts in plain text or HTML.
Open tool →Robots.txt Generator
Build crawler directives, allowed exceptions, and sitemap references for your robots.txt file.
Open tool →CSS Media Query Builder
Create responsive CSS queries with width ranges, orientation, and motion preferences.
Open tool →AI Prompt Generator & Writing Guide
Build detailed prompts with task templates, context, examples, output formats, and a practical writing guide.
Open tool →Prompt Checklist Reviewer
Inspect prompt structure with transparent local checks and create a revision brief.
Open tool →AI Token & Cost Estimator
Estimate context usage and API costs using your own model limits and pricing.
Open tool →AI Context Pack Builder
Organize reference material into a labeled context pack with sources and instructions.
Open tool →AI Image Prompt Builder
Compose visual briefs with subject, composition, lighting, style, and exclusions.
Open tool →Batch Image Optimizer & Converter
Resize and convert up to 20 images locally, compare results, and download a ZIP.
Open tool →Website SEO & Broken Link Auditor
Audit public pages for SEO issues and broken links, with an exportable report.
Open tool →CSV / JSON Data Cleaner & Converter
Clean, deduplicate, map columns, and convert CSV or JSON with a table preview.
Open tool →Visual CSS Layout Builder
Design responsive Grid and Flexbox layouts with independent breakpoints and HTML export.
Open tool →Text & Code Difference Checker
Compare text and code by line or word, normalize JSON, and download changes.
Open tool →JSON Structure Explorer
Inspect nested JSON values, select JSON Pointer paths, and export a selected value.
Open tool →List Comparison
Find shared items, differences and unique combinations across two lists.
Open tool →UTM Campaign URL Builder
Build campaign links while preserving unrelated query parameters and fragments.
Open tool →Unicode Text Inspector
Inspect code points, text normalization, character clusters and UTF-8 byte counts.
Open tool →URL Query Editor
Edit ordered query parameters, including duplicate keys, without opening the URL.
Open tool →JSON Lines Converter
Convert JSON arrays to JSON Lines and validate JSON Lines with precise line errors.
Open tool →CSS Easing Playground
Shape a cubic-bezier curve, preview motion and export reusable transition CSS.
Open tool →File Checksum Verifier
Calculate a local file hash and compare it with an expected SHA-256, SHA-384 or SHA-512 checksum.
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