All 61 tools
Each one runs locally. None of them is verified in a browser yet, which is why there is no store listing.
Inspect
Read what the page is really doing, not what you hoped it was doing.
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Responsive Viewer
Test pages on multiple mobile, tablet, laptop & desktop viewports with synchronized scroll.
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Extract Images
Find, filter, preview and bulk download all images, favicons and SVGs from the active page.
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Color Picker
Sample any pixel, inspect contrast, convert HEX/RGB/HSL, and export palettes.
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JSON Formatter
Format, validate, repair and inspect JSON with interactive collapsible tree and syntax views.
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Page Speed
Analyze real-time Web Vitals (TTFB, FCP, LCP, CLS), network resources, and page weight.
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Web Scrape
Auto-detect and scrape tables, lists, feeds, and cards with live export to CSV, JSON, and Clipboard.
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SEO Meta
On-page audit · meta · social · headings · images · links
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Internet Speed
Measure download speed, upload speed, ping, jitter, and provider capability ratings.
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Site Stack
Frameworks · CMS · analytics · CDN · server
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Export Element
Pick · HTML + matched CSS -> CodePen
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Color Palette
Extract every color used · highlight elements
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List Fonts
Detect fonts on the page · highlight usage
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Ruler & Measure
Click two points · distance · angle · ΔX / ΔY
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Cookie Editor
List · search · add · edit · export cookies
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CSS Inspector
Live styles + computed values
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Layout Tools
Box model · flex/grid · parents · children
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Accessibility
Contrast · alt text · ARIA · headings · labels
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Code Injection
JS · CSS · HTML · per-domain drafts + snippets
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Live Text Editor
Click to edit · track changes · export HTML
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URL Inspector
Break a URL into its parts, or rebuild it without the tracking parameters.
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Storage Inspector
Read, edit and export this page's local and session storage.
Capture
Take exactly the screenshot you meant to take.
Design
Try a change on a live page before you write the CSS.
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Font Changer
Pick element · 50+ Google Fonts · live preview
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Pattern Background
8 patterns · live preview · presets · copy CSS
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Dark Mode
Force dark on any site · per-domain · brightness
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CSS Unit Converter
Convert between px, rem, em and every absolute CSS unit.
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Fluid Type Calculator
Build a clamp() that scales type smoothly between two viewport widths.
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Color Converter
Convert between hex, RGB, HSL and OKLCH, with luminance and contrast.
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Contrast Checker
Check a colour pair against every WCAG 2.2 threshold at once.
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Gradient Builder
Build a CSS gradient with a live preview and copy the declaration.
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Shadow Builder
Build a layered CSS box-shadow with a live preview.
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Image Resizer
Resize, compress and convert an image on your own device.
Code
Work on markup, data and snippets without leaving the page.
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Base64
Encode or decode Base64, including URL-safe and any Unicode text.
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URL Encoder
Percent-encode or decode a URL or a single query component.
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HTML Entities
Escape or unescape HTML entities, named, decimal and hex.
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JWT Inspector
Decode a token header and payload locally. Never claims the signature is valid.
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Hash Generator
SHA-256, SHA-1, SHA-384 and SHA-512 from the browser Web Crypto.
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Regex Tester
Test a regular expression against text, with capture groups and replacement.
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Text Diff
Compare two texts line by line and see exactly what changed.
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JSON and CSV Converter
Convert between JSON and a spreadsheet table, safely in both directions.
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Cron Parser
Read a cron expression in plain English and see its next runs.
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curl to fetch
Turn a curl command into fetch, with the unsupported flags named.
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Number Base Converter
Convert between bases with BigInt, plus a two-complement bit view.
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String Escaper
Escape a string for JSON, JavaScript, a shell, a regex, CSV or SQL.
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Markdown Preview
Render Markdown to safe HTML, or strip it back to plain text.
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SVG Sanitiser
Strip anything executable from an SVG using a strict allowlist.
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HTML Formatter
Indent and check markup, or minify it.
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CSS Formatter
Format or minify CSS without breaking strings and url() values.
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JavaScript Formatter
Indent JavaScript without running it, and refuse when unsure.
Productivity
The small utilities you keep opening a separate tab for.
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World Clock
Track multiple international timezones with relative time offsets and digital clocks.
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QR Code
Generate customizable stylized QR codes with logos and scan QR codes from web pages or images.
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Picture-in-Picture
Pop out any video into an always-on-top floating window with playback controls and auto-PiP.
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URL Opener
Bulk-open URLs · pause/stop/adjust mid-run
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AI Assistant
BYOK chat over OpenAI-compat · page context · streaming
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UUID Generator
Generate random v4 or time-ordered v7 identifiers.
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Timestamp Converter
Convert between Unix time and a readable date, in both directions.
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Text Statistics
Count characters, words and bytes, and convert between cases.
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Campaign Link Builder
Build a UTM-tagged link and catch the mistakes that split a report.
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Slug Generator
Make a URL slug, and see which characters it could not transliterate.
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Meta Tag Builder
Build search and social tags, and see which a crawler would ignore.