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Fast, reliable online tools for developers, writers, SEOs, and everyone in between. No fluff, no login walls — just tools that work.

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Featured Tools

Text Tools

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Word & Character Counter

Count words, characters, sentences and get estimated reading time instantly.

Case Converter

Convert text to UPPER, lower, Title, camelCase, snake_case and more.

Text Diff Checker

Compare two texts side by side and see what changed instantly.

Reverse Text

Reverse characters, words or lines in your text instantly.

Developer Tools

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JSON Formatter & Validator

Beautify and validate raw JSON data with syntax error detection.

Base64 Encoder / Decoder

Encode plain text to Base64 or decode Base64 strings back instantly.

Regex Tester

Test regular expression patterns with live match highlighting.

UUID Generator

Generate UUID v4 identifiers in bulk, right in your browser.

SEO Tools

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Keyword Density Analyzer

Analyze keyword frequency and density in any text.

Readability Score

Score Flesch-Kincaid reading ease and grade level.

SERP Preview Simulator

Preview how your page appears in Google search results.

Meta Tag Analyzer

Check title, description, OG tags and basic SEO signals.

Security Tools

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Password Strength Checker

Analyze how secure your password is with a real-time 7-point breakdown.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text.

Random Password Generator

Create strong, customisable passwords with a single click.

JWT Decoder

Decode JWT tokens to inspect header, payload and signature.

Network Tools

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IP Address Lookup

Find your public IP, country, city and ISP information.

HTTP Status Code Ref

Browse all HTTP status codes from 1xx to 5xx.

Subnet / CIDR Calculator

Calculate network address, broadcast and hosts from CIDR.

URL Parser

Break a URL into protocol, host, path, query and fragment.

Calculators

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Simple Calculator

Perform basic arithmetic — add, subtract, multiply, divide right in your browser.

BMI Calculator

Check your Body Mass Index and see which health category you fall into.

Tip Calculator

Split restaurant bills evenly and calculate the perfect tip.

Mortgage Calculator

Estimate monthly payments, total interest, and full amortization.

Image & Media Tools

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QR Code Generator

Generate QR codes from any text or URL instantly.

Image to Base64

Convert any image to a Base64 data URI string.

Image Info

View detailed image metadata, dimensions and file info.

Favicon Generator

Design and download custom favicons in a click.

Webmaster Tools

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SSL Certificate Checker

Check SSL certificate details and expiration for any domain.

Page Speed Test

Simulate performance, accessibility, SEO and best practice scores.

DNS Propagation Checker

Look up A, AAAA, MX, NS, TXT and CNAME records for any domain.

Mobile-Friendly Test

Simulate mobile usability checks and viewport compatibility.

AI Tools

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AI Writer

Write content, articles, blogs, emails, stories and more with AI assistance.

AI Summarizer

Summarize long articles, documents and text into concise key points.

AI Chat Assistant

Chat with an AI assistant - ask questions, get help, brainstorm ideas.

AI Grammar Fixer

Fix grammar, spelling and punctuation mistakes with AI precision.

Legal Generators

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Generate a privacy policy compliant with GDPR, CCPA and global laws.

Generate a custom Terms of Service agreement for your website or app.

Cookie Policy Gen

Generate a cookie policy explaining your use of cookies and trackers.

Disclaimer Gen

Generate a disclaimer for your website covering liability limitations.

Games & Fun

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Spinning Wheel

Custom spinning wheel — add your options, spin for a random result.

Rock Paper Scissors

Play rock paper scissors against the computer. Keep score.

Trivia Quiz

Test your knowledge — 10 random questions across multiple categories.

Would You Rather?

Choose between two options. See what percentage of people agree.

Writing Tools

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Grammar & Spell Checker

Check text for common grammar, spelling and punctuation mistakes.

Article Rewriter

Rewrite articles with synonyms — original vs rewritten side by side.

Title Capitalizer

Capitalize titles using AP, APA, MLA and Chicago rules.

Syllable Counter

Count syllables per word using vowel-grouping rules.

View All 170+ Tools

Simple as it gets

How Testrefy Works

Pick Your Tool

Browse our growing library of free tools organised by category. Search by name or filter instantly.

Paste & Run

Input your data directly in the browser. Everything runs locally — nothing is sent to any server ever.

Get Your Result

Copy or use the output immediately. No account, no email, no waiting — done in seconds.

Free · Fast · No Signup

All Tools

Every tool we offer, in one place. Filter by category or search below.

All Tools

12 tools

Word & Character Counter

Count words, characters, sentences and reading time in real time.

Password Strength Checker

Analyze password security with a real-time 7-point breakdown.

Base64 Encoder / Decoder

Encode or decode Base64 strings instantly in your browser.

JSON Formatter & Validator

Beautify and validate JSON with syntax error detection.

Case Converter

Convert text to UPPER, lower, Title, camelCase, snake_case and more.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text.

URL Encoder / Decoder

Encode or decode URL strings and query parameters safely.

Meta Tag Analyzer

Check title, description, OG tags and basic SEO signals.

HEX ↔ RGB Converter

Convert between HEX and RGB with a live color preview.

IP Address Lookup

Find your public IP, country, city and ISP information.

Lorem Ipsum Generator

Generate placeholder dummy text for mockups and designs.

Unix Timestamp Converter

Convert timestamps to readable dates and back. Live ticker.

Text Diff Checker

Compare two texts side by side and see changes highlighted.

Find & Replace

Advanced search-and-replace with case and regex options.

Character / Word Frequency

Count how often each character or word appears in text.

UUID Generator

Generate UUID v4 identifiers — one or hundreds at once.

Regex Tester

Test regex patterns with live match highlighting and flags.

HTML Entity Encoder / Decoder

Encode or decode & < > " and other HTML entities.

Number Base Converter

Convert between binary, octal, decimal and hexadecimal.

CSS Unit Converter

Convert px, em, rem and % values with a configurable base.

Random Password Generator

Create strong, customisable passwords with one click.

HTTP Status Code Reference

Browse all HTTP status codes from 1xx to 5xx.

Reverse Text

Reverse characters, words or lines in your text instantly.

Remove Duplicate Lines

Remove duplicate lines from your text in one click.

Palindrome Checker

Check if text reads the same forwards and backwards.

Text to Slug Converter

Convert any text to a clean URL-friendly slug.

Keyword Density Analyzer

Analyze keyword frequency and density in your text.

Readability Score

Score Flesch-Kincaid reading ease and grade level.

SERP Preview Simulator

Preview how your page appears in Google search results.

Heading Structure Analyzer

Extract and display heading hierarchy from your HTML.

Robots.txt Validator

Check the syntax of your robots.txt directives.

OG Meta Tag Generator

Generate Open Graph meta tags from your inputs.

Sitemap URL Generator

Generate an XML sitemap from a list of URLs.

Canonical URL Checker

Verify canonical URLs are properly formatted.

Alt Text Inspector

Extract all img alt attributes from a block of HTML.

JWT Decoder

Decode JWT tokens and inspect header, payload and signature.

Caesar Cipher

Encode or decode text using a configurable Caesar shift.

HMAC Generator

Generate HMAC-SHA256 and HMAC-SHA512 for any message.

Random Number Generator

Generate cryptographically secure random numbers.

API Key Generator

Generate secure API keys with configurable formats.

Credit Card Validator

Validate credit card numbers using the Luhn algorithm.

Text Obfuscator

Obfuscate text with a simple character-shift cipher.

Subnet / CIDR Calculator

Calculate network address, broadcast and hosts from CIDR.

MAC Address Generator

Generate random valid MAC addresses for any purpose.

URL Parser

Break a URL into protocol, host, path, query and fragment.

Port Number Reference

Browse common TCP/UDP port numbers and services.

IPv4 / IPv6 Validator

Validate and classify IPv4 and IPv6 addresses.

Email Extractor

Extract all email addresses from any block of text.

IP Range Calculator

Get first/last IP and total hosts from a CIDR range.

Binary IP Converter

Convert an IP to its binary and hex representation.

Simple Calculator

Perform basic arithmetic operations in your browser.

Mortgage Calculator

Calculate monthly payments and total interest for any mortgage.

BMI Calculator

Calculate your Body Mass Index and health category instantly.

Tip Calculator

Split bills and calculate tips per person in seconds.

Percentage Calculator

Find % of, % change and % difference between values.

Discount Calculator

Calculate savings and final price after any discount.

Age Calculator

Find your exact age in years, months and days.

Loan Calculator

Calculate monthly payments, total interest and total cost.

Unit Converter

Convert between length, weight, temperature and volume.

Time Duration Calculator

Calculate the exact duration between two dates or times.

Bill Splitter

Split any bill equally or unequally between people with tip.

Spinning Wheel

Custom spinning wheel — add your options, spin for a random result.

Who Pays the Bill?

Add names, spin to randomly pick who pays the bill tonight.

Rock Paper Scissors

Play rock paper scissors against the computer. Keep score.

Decision Maker

Can't decide? Enter your options and let the randomizer choose.

Trivia Quiz

Test your knowledge — 10 random questions across multiple categories.

Would You Rather?

Choose between two options. See what percentage of people agree.

Number Guessing Game

Guess the secret number. Computer tells you higher or lower.

Reaction Time Test

Test your reflexes — click as fast as you can when the screen turns green.

Word Scramble

Unscramble the jumbled word as fast as you can to score points.

Truth or Dare

Random truth questions and dare challenges for any group.

QR Code Generator

Generate QR codes from any text or URL instantly.

Image to Base64

Convert images to Base64 data URIs with preview.

Image Info

View dimensions, file size, type and aspect ratio.

EXIF Viewer

Read camera data, date, GPS and orientation from JPEGs.

Favicon Generator

Design and download custom favicons with text or emoji.

Color Extractor

Extract dominant colors from images as hex swatches.

SVG Minifier

Remove comments and whitespace from SVG code.

Data URI Maker

Generate data URIs from any file upload.

SSL Certificate Checker

Check SSL certificate details and expiration for any domain.

Page Speed Test

Simulate performance, accessibility, SEO and best practice scores.

DNS Propagation Checker

Look up A, AAAA, MX, NS, TXT and CNAME records for any domain.

Cache Checker

Check if a URL is cached and view cached page metadata.

Hreflang Tag Generator

Generate hreflang tags for multilingual SEO targeting.

Schema Markup Validator

Validate JSON-LD structured data for Schema.org compliance.

Mobile-Friendly Test

Simulate mobile usability checks and viewport compatibility.

Redirect Tracer

Trace HTTP redirect chains from start to final destination.

Grammar & Spell Checker

Check your text for common grammar, spelling and punctuation mistakes.

Article Rewriter / Paraphrasing

Rewrite articles with synonym replacement — original vs rewritten side by side.

Title Capitalizer

Capitalize titles using AP, APA, MLA and Chicago style rules.

Syllable Counter

Count syllables per word using vowel-grouping rules and see per-word breakdown.

Quote Generator

Discover inspirational, motivational and wisdom quotes from famous authors.

Rhyme Finder

Find perfect and near rhymes for any word from a built-in dictionary.

Sentence Counter

Count sentences, view each one numbered, and check average length.

Reading Time Estimator

Estimate reading time at various WPM speeds — 100 to 500 WPM.

AI Writer

Write content, articles, blogs, emails, stories and more with AI assistance.

AI Summarizer

Summarize long articles, documents and text into concise key points.

AI Paraphraser

Rewrite any text with improved clarity, tone and vocabulary.

AI Grammar Fixer

Fix grammar, spelling and punctuation mistakes with AI precision.

AI Text Expander

Expand short phrases and ideas into detailed, well-written paragraphs.

AI Text Shortener

Condense long content into brief, clear summaries while preserving meaning.

AI Title Generator

Generate catchy, clickable titles and headlines for any topic.

AI Blog Generator

Write complete blog posts on any topic with AI-powered content generation.

AI Email Writer

Craft professional, friendly or persuasive emails for any situation.

AI Product Description

Generate compelling product descriptions that drive sales.

AI Social Post

Create engaging social media posts optimized for any platform.

AI Hook Generator

Generate attention-grabbing hooks and opening lines for any content.

AI Haiku Generator

Generate beautiful and creative haikus on any topic.

AI Story Generator

Write short stories with original plots, characters and settings.

AI Joke Generator

Generate jokes and puns - funny, clever and entertaining humor.

AI Poem Generator

Generate original poems in any style - sonnet, free verse, limerick.

AI Lyric Generator

Generate original song lyrics in any genre with rhyme and rhythm.

AI Business Name Gen

Generate unique, creative business name ideas for any industry.

AI Slogan Generator

Generate memorable slogans, taglines and brand mottos.

AI Bio Generator

Write professional bios, about-me pages and personal introductions.

AI Headline Analyzer

Analyze headline effectiveness and get AI-powered improvement suggestions.

AI SEO Content Writer

Write SEO-optimized content with keyword-rich paragraphs.

AI Job Description

Generate professional job descriptions with clear requirements and perks.

AI Char Counter

Smart character counter with AI-powered writing insights.

AI Readability

Analyze and improve text readability with AI suggestions.

AI Meta Tags

Generate SEO-optimized meta titles and descriptions with AI.

AI Regex Generator

Generate regular expressions from plain-English descriptions using AI.

AI Answer Generator

Generate detailed, well-researched answers to any question using AI.

AI Color Palette

Generate harmonious color palettes for any mood, brand or theme.

AI Chat Assistant

Chat with an AI assistant - ask questions, get help, brainstorm ideas.

Generate a custom Terms of Service agreement for your website or app.

Generate a privacy policy compliant with GDPR, CCPA and global laws.

Cookie Policy Gen

Generate a cookie policy explaining your use of cookies and trackers.

Disclaimer Gen

Generate a disclaimer for your website covering liability limitations.

EULA Gen

Generate an End-User License Agreement for your software or app.

Refund Policy Gen

Generate a clear refund policy for your e-commerce or SaaS business.

Shipping Policy Gen

Generate a shipping policy for physical goods and delivery services.

Return Policy Gen

Generate a return and exchange policy for your store or business.

GDPR Compliance Gen

Generate a GDPR compliance notice for European user data protection.

CCPA Compliance Gen

Generate a CCPA compliance notice for California consumer privacy rights.

Guides & Insights

Testrefy Blog

Latest guides on SEO, security, developer workflows, and webmastering.

Our Story

About Testrefy

We built the tools we always wished existed — fast, honest, completely free.

Why We Built This

Every developer, writer, and SEO professional has had the same experience: you need a quick word count, or to encode a Base64 string, or to check if your JSON is valid — and every tool you find is buried under pop-ups, login walls, and ads covering half the screen.

Testrefy exists to fix that. We built a collection of genuinely useful tools that are fast, clean, and free to use without giving us your email address.

Fast

All tools run in your browser. No server round-trips. Results are instant.

Private

Your data never leaves your device. We don't log inputs or store results.

Free

Every tool, forever. No freemium tricks, no signup, no premium tier.

What We Offer

Testrefy currently offers 60+ free online tools across six categories:

Text tools (10+) — Word counter, Case converter, Lorem ipsum generator, Text diff checker, Find & Replace, Character/word frequency, Reverse text, Remove duplicate lines, Palindrome checker, Text to slug converter
Developer tools (10+) — Base64, JSON formatter, URL encoder, HEX/RGB converter, Timestamp converter, UUID generator, Regex tester, HTML entity encoder/decoder, Number base converter, CSS unit converter
SEO tools (10+) — Meta tag analyzer, Keyword density analyzer, Readability score, SERP preview simulator, Heading structure analyzer, Robots.txt validator, OG meta tag generator, Sitemap URL generator, Canonical URL checker, Alt text inspector
Security tools (10+) — Password strength checker, Hash generator (MD5/SHA), Random password generator, JWT decoder, Caesar cipher, HMAC generator, Random number generator, API key generator, Credit card validator, Text obfuscator
Network tools (10+) — IP address lookup, HTTP status code reference, Subnet/CIDR calculator, MAC address generator, URL parser, Port number reference, IPv4/IPv6 validator, Email extractor, IP range calculator, Binary IP converter
Calculator tools (10+) — Simple calculator, Mortgage calculator, BMI calculator, Tip calculator, Percentage calculator, Discount calculator, Age calculator, Loan calculator, Unit converter, Time duration calculator

How We Stay Free

Testrefy is supported by non-intrusive Google AdSense advertisements. We keep ads tasteful — we will never show pop-ups or anything that gets in the way of using the tools.

Contact

Have a question, a tool request, or found a bug? Drop us a message at hello@testrefy.com.

Legal

We believe in being clear about data — which is very little.

📅 Last updated: January 2026

Overview

Testrefy ("we") operates testrefy.com. Short version: all tools run locally in your browser — we do not receive, store, or process any text you enter. We use Google AdSense which may use cookies.

Information We Do NOT Collect

Text you paste into any tool
Passwords entered into the password checker
Any data used for hashing, encoding, or conversion

Information We Do Collect

Standard anonymous analytics: pages visited, browser type, approximate country. Used only to understand which tools are popular and improve the site.

Advertising (Google AdSense)

Google AdSense uses cookies to serve relevant ads. You may opt out via Google's Ad Settings. See the Google Privacy Policy for details.

Third-Party Services

The IP Lookup tool uses ipapi.co. When you click Lookup, a request is made from your browser directly to their service. Their privacy policy applies.

Contact

Questions? Contact us at hello@testrefy.com.

Legal

The rules for using our free tools.

📅 Last updated: January 2026

1. Acceptance of Terms

By accessing and using Testrefy.com, you accept and agree to be bound by the terms and provision of this agreement. We provide these free tools completely "as is" and without any warranties.

2. Use License

Permission is granted to temporarily use the tools on Testrefy.com's website for personal or commercial use. This is the grant of a license, not a transfer of title. We reserve the right to ban IPs attempting to abuse, scrape, or otherwise maliciously overwhelm our services.

3. Disclaimer regarding Tool Accuracy

While we strive for perfection, Testrefy makes no warranties, expressed or implied, regarding the absolute accuracy of the results generated by our tools (such as the Word Counter, Calculators, or Security Tools). Always verify output for critical or production use. You assume full responsibility and risk for any actions you take based on the output of our platform.

4. Advertising and Cookies

We use Google AdSense to serve ads on our site. Google uses cookies to serve ads based on a user's prior visits to our website or other websites. By using our site, you consent to this standard ad-serving behavior.

Support

Have a question or found a bug?

Get In Touch

We're always looking to improve Testrefy! If you have a feature request, noticed that a tool isn't working quite right, or just want to say hi, we'd love to hear from you.

Support & General Inquiries:
support@testrefy.com

Advertising & Partnerships

If you're interested in advertising with us or discussing a potential partnership, please reach out to the email above and mention "Partnership" in your subject line.

Tools That ActuallyGet Things Done

Why We Built This

What We Offer

How We Stay Free

Contact

Overview

Information We Do NOT Collect

Information We Do Collect

Advertising (Google AdSense)

Third-Party Services

Contact

1. Acceptance of Terms

2. Use License

3. Disclaimer regarding Tool Accuracy

4. Advertising and Cookies

Get In Touch

Advertising & Partnerships

Tools That Actually
Get Things Done