Conversion
Unit Converter
Convert length, weight, temperature, volume, speed, and area between metric and imperial units.
Currency Converter
Live exchange rates for 150+ world currencies. USD, EUR, GBP, JPY and more.
Calculators
Percentage Calculator
Calculate percentages, percentage change, and what percent one number is of another.
BMI Calculator
Calculate your Body Mass Index using metric or imperial measurements.
Age Calculator
Find your exact age in years, months, and days from your date of birth.
Loan Calculator
Calculate monthly payments, total interest, and compare loan scenarios. Personal loans, auto loans, and more.
Mortgage Calculator
Calculate monthly payments, total interest, and view a full amortization schedule with tax and PMI.
Compound Interest Calculator
See how investments grow over time with compound interest, monthly contributions, and inflation adjustment.
ROI Calculator
Calculate return on investment, annualized ROI (CAGR), and break-even revenue for any purchase or project.
Salary Calculator
Convert salary between hourly, daily, weekly, bi-weekly, monthly, and annual rates with after-tax estimates.
Tip Calculator
Calculate tip amounts and split the bill evenly among your group.
Text Tools
Word Counter
Count words, characters, sentences, and paragraphs in any block of text.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, or sentence case instantly.
Text Diff
Compare two blocks of text line by line. Highlights added and removed lines instantly.
Markdown Previewer
Live Markdown editor with instant preview. Supports GFM, tables, code highlighting.
Date & Time
Time Zone Converter
Convert times across world time zones. Perfect for scheduling remote meetings.
Date Calculator
Calculate the number of days between two dates, or add and subtract from a date.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live current timestamp ticker.
Date Format Converter
Paste any date and instantly convert it to ISO 8601, US, European, Unix, RFC 2822, and more.
Business Days Calculator
Calculate business days between dates or add/subtract working days. Supports US and UK holidays.
Week Number
Find the ISO week number for any date, or look up the dates for any week. Full year calendar view.
Days Until
Live countdowns to holidays and events. Calculate days until or since any date.
IVF Due Date Calculator
Calculate your estimated due date from fresh or frozen embryo transfer. Supports Day 3 and Day 5 blastocyst transfers.
Pomodoro Timer
Stay focused with timed work sessions and breaks. Customizable intervals and browser notifications.
Developer Tools
JSON Formatter
Format, validate, and beautify JSON with syntax highlighting. Minify or prettify instantly.
JSON Converter
Convert JSON to CSV, XML, or YAML. Download the converted output for spreadsheets, config files, or legacy systems.
JSON Diff
Compare two JSON objects side by side. See added, removed, and changed keys instantly.
Base64 Encoder / Decoder
Encode text or files to Base64, or decode Base64 strings back to plain text.
JWT Decoder
Decode JSON Web Tokens to inspect the header, payload, claims, and expiry date.
URL Encoder / Decoder
Encode special characters for URLs or decode percent-encoded strings instantly.
Hash Generator
Generate MD5, SHA-1, SHA-256, and other hash digests from text or files.
Color Converter
Convert colors between HEX, RGB, HSL, and CSS formats with a live preview.
Gradient Generator
Build CSS gradients visually. Linear, radial, and conic with drag-to-reorder stops. Copy ready-to-use CSS.
Color Palette Generator
Generate harmonious color palettes from any base color. Export as CSS, Tailwind, JSON, SVG, or PNG.
Contrast Checker
Check WCAG color contrast accessibility. Test AA/AAA compliance with fix suggestions.
Image Resizer
Resize images by dimensions, percentage, or presets. 100% client-side — nothing uploaded.
Image Compressor
Reduce image file size by adjusting quality. Before/after comparison. Nothing leaves your browser.
Image Converter
Convert images between JPG, PNG, WebP, and BMP formats. 100% client-side — nothing uploaded.
Number Base Converter
Convert numbers between binary, decimal, hexadecimal, and octal bases.
UUID Generator
Generate UUIDs/GUIDs in v1, v4, or v7. Bulk generate up to 100, copy or download.
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, words, or HTML. Multiple styles available.
QR Code Generator
Generate QR codes for URLs, text, email, Wi-Fi, phone, and SMS. Download as PNG or SVG.
Random String Generator
Generate secure random strings, passwords, API keys, and tokens with full character set control.
Meta Tag Generator
Generate SEO meta tags, Open Graph, and Twitter Cards with live Google and social preview.
Testers & Validators
Regex Tester
Test regular expressions with real-time highlighting, capture groups, and find-and-replace.
CRON Explainer
Paste a cron expression and get a plain-English explanation plus the next 5 run times.
SQL Formatter
Format messy SQL with proper indentation and syntax highlighting. Supports all major dialects.
CSS Minifier / Beautifier
Minify CSS to reduce file size or beautify it for readability. See savings percentage instantly.
HTML Beautifier / Minifier
Format HTML with proper indentation or minify it for production. Syntax highlighted output.
XML Formatter / Validator
Format, validate, and minify XML documents with syntax highlighting and error detection.
Network & Reference
HTTP Status Codes
Complete reference of all HTTP status codes with plain-English descriptions. Searchable and filterable.
MIME Type Lookup
Look up MIME types by file extension or find extensions for a given content type.
IP Address Lookup
Look up geolocation, ISP, and network info for any IP address — or detect your own.
DNS Lookup
Query DNS records for any domain — A, AAAA, MX, TXT, CNAME, NS, SOA, and CAA.
Ping Test
Measure HTTP response latency to any public URL with live stats and a latency chart.
What is ToolPlex?
ToolPlex is a free, growing collection of online tools designed for everyday tasks. Whether you need to convert units, calculate a percentage, check your BMI, or count words in a document — ToolPlex has a tool for that. No account needed, just instant results in your browser.
Why Use ToolPlex?
All ToolPlex tools run entirely in your browser — nothing is sent to a server. They're fast, private, and always free. We're constantly adding new tools based on what people actually search for, so bookmark this page and check back often.