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Fast · Free · Browser-Based

Developer Tools Built for Speed & Productivity

Format, validate, convert, encode, decode and generate with our collection of 30+ developer utilities.

100% Client-side No Data Stored Always Free Instant Results
json-formatter.tool
Live demo
Press "Format" to see clean, indented JSON here.
ready
100+ ToolsDeveloper utilities
Fast & SecureInstant results
100% FreeNo sign-up required
Privacy FocusedBrowser-side processing
Loved by DevelopersSimple and dependable

Check your own site

Free · No sign-up · Nothing stored

See every SEO problem
on your page — in one report.

A weighted score, live Google and social previews, Core Web Vitals, a broken-link crawl and a prioritised fix list worth points each — handed over as a branded PDF.

90+ checksGoogle & social previewCore Web Vitals Broken linksPDF report
90+checks run
~25stypical audit
0data kept
Nothing stored. Every audit runs fresh. See a sample report
Live · server-side

Website Inspector
the full technical picture.

Enter a domain or URL to get a real report — fetched by our own backend, never faked in the browser.

  • SEO metadata
  • Technology stack
  • Security headers
  • SSL certificate
  • Server & DNS
  • Live screenshot
  • Core Web Vitals
  • Redirect chain
No sign-up. Nothing stored. Inspect a site
🧰 Explore Developer Utilities

Tools for Every Developer Task

Browse our main tool categories and quickly find utilities for websites, APIs, coding, security, networking, files, data and everyday development.

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Website & SEO

Website checker, sitemap audit, redirects, metadata, robots.txt and SEO analysis.

Sitemap Redirects Metadata
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Network & DNS

Speed tests, ping, traceroute, IP details, DNS records and server connectivity.

Speed Test DNS IP Tools
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Security

Security headers, SSL, TLS, CSP, CORS, password and hashing utilities.

SSL Headers CSP
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JSON, XML & Data

Format, validate, compare, convert and inspect structured data files.

JSON XML CSV
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Code & Development

Code generators, converters, beautifiers, regex, SQL and development helpers.

Code SQL Regex
✍️
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Text & Encoding

Text cleaning, case conversion, Base64, URL encoding and content comparison.

Text Base64 Encoding
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Date, Math & Conversion

Date calculators, percentages, timestamps, units and number converters.

Date Math Units
🖼️
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Image & PDF

Resize, compress, convert images and merge, split, protect or edit PDFs.

Images PDF Convert
🖥️
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Server & API

HTTP requests, response headers, API testing, server details and hosting checks.

API HTTP Server
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Developer Utilities

UUIDs, tokens, quick notes, Markdown, browser information and productivity tools.

UUID Tokens Utilities
🧰 Browse All Developer Tools →

Measure your own connection

Measured, not estimated

Network Path &
Nearby Access Points.

Ping, download, upload and traceroute measured against this site's own server, plotted on a real map of your approximate location.

Ping18 ms
Download94.6 Mbps
Upload41.2 Mbps
Traceroute11 hopsto origin
Access points3estimated
Sample figures. Access points are clearly labelled estimates. Open NetPath Pro
Direct to our server

Internet Speed Test
download, upload, ping, jitter.

A smooth, modern gauge tested directly against this site's own server — never a third-party proxy.

0.0Mbps
sample result · your own will vary
Download94.6
Upload41.2
Ping18 ms
Jitter3 ms
Wi-Fi, VPNs and browser extensions all move the number. Run it twice and compare — a single result tells you less than you think.
No third-party proxy. Results are ours end to end. Start speed test
// NEW_TOOLS

See exactly what websites store about you

Every site you visit leaves things in your browser — storage entries, cookies, login tokens, cached files. Almost none of it is visible without opening developer tools and knowing where to look. These two tools make it plain in one click.

Browser Privacy & Storage Analyzer

What this page can read about you right now: storage, cookies, tokens, permissions, fingerprint surface and which files came from your cache.

Open the analyzer →

Site Storage Inspector

A one-click bookmarklet that runs the same check on any site you're on — including ones you're logged into. Nothing leaves your browser.

Get the bookmarklet →

A website can only read its own data — that's the same-origin policy, and it's what stops any page reading your bank session. The inspector doesn't break that rule; it works inside it.

One minute, end to end — what a site stores, and how to look at it yourself.

Watch on YouTube More on our channel

Built like a workbench, not a funnel

No account walls, no watching an upload spinner while your data leaves the building.

// 01_PRIVACY

Your data stays local

Formatting and encoding tools run entirely in your browser tab. Nothing is uploaded to a server to do the work.

// 02_SPEED

No queues, no spinners

Every tool opens instantly and processes as you type — there is no backend round-trip to wait on.

// 03_CLARITY

Errors you can act on

When something is malformed, you get the exact line and character at fault, not a generic failure message.

Learn & Grow with the Knowledge Base

Explore practical guides, examples and best practices covering data formats, APIs, tokens, web technologies and SEO.

Explore guides →
Reads the page like a person would

Readable Content Analyser
what’s actually on the page.

Word count, reading time, readability, media, links and the words a page leans on most — at a glance, with the detail one tap away.

Text & headingsImages & videoInternal / external links Word frequencyRaw HTML
Sample readoutyour page will differ
1,842words
7 minto read
14images · 2 video
34links found
Grade 9 · plainreadability denseplain
Words the page leans on
course46
salary38
exam29
admission24
stipend12
26internal
8external
2nofollow
Counts what the HTML actually delivers — the same bytes a crawler reads on its first request, before any JavaScript runs. Analyse a page