PAYATE Card & Payment Tools

A free suite of browser-based tools for developers, QA engineers and merchants — validate and mask card numbers, look up a BIN, and generate synthetic test cards, addresses and profiles. Every tool runs offline format checks only; nothing is stored.

💳 Card & Payment

17
Card Validator Check a single card number's Luhn validity, brand and BIN details. Open tool → Luhn Checker Validate and mask single or bulk card numbers, with brand detection. Open tool → Card Checker Generate random Luhn-valid test cards and bulk-check their format, with a simulated demo balance. Open tool → CardVault — Prepaid Cards Compare the best prepaid and virtual Visa/Mastercard options for freelancers and online payments. Open tool → CoinVault — Crypto Exchanges Compare the best crypto exchanges to buy and sell Bitcoin and crypto, with referral links. Open tool → BIN Lookup Identify the issuing bank, scheme and country from a card BIN. Open tool → Card Generator Generate synthetic, Luhn-valid test cards by BIN for development. Open tool → Visa Generator Generate correctly formatted Visa test numbers for QA. Open tool → Bulk Generator Bulk-generate test cards and export them as CSV, JSON or XML. Open tool → IBAN Validator Validate the MOD-97 checksum of an IBAN, or generate synthetic test IBANs. Open tool → Payment Sandbox Simulate gateway responses (approved, declined) with the published test cards. Open tool → BIN-IP Fraud Detector Compare a card's BIN country with the buyer's IP country to flag risk. Open tool → Bulk BIN Checker Look up scheme, bank and country for many card BINs at once (offline). Open tool → BIN Search Find BIN/IIN ranges by issuing bank name or country (reverse lookup). Open tool → SWIFT / BIC Code Lookup Validate any SWIFT / BIC code and browse bank SWIFT codes by country — bank, country, location and branch. Open tool → IBAN Generator & Format Generate a valid-format test IBAN for 88 countries and see the IBAN length and structure per country. Open tool → Address Generator Create fictional profiles, names and addresses for testing and demos. Open tool →

🧮 Calculators

35
Loan / EMI Calculator Work out monthly loan payments, total interest and total cost from any rate. Open tool → Mortgage Calculator Estimate your monthly mortgage payment with taxes, insurance and PMI, plus total interest. Open tool → Tip Calculator Calculate the tip and split the bill between any number of people. Open tool → Discount Calculator Find the sale price and how much you save from an original price and percent off. Open tool → Percentage Calculator Calculate percentages: X% of Y, X is what % of Y, percentage change and more. Open tool → Average Calculator Calculate the mean, median, mode, range and standard deviation of a set of numbers. Open tool → Scientific Calculator A full scientific calculator: trigonometry, logs, powers, factorials and memory. Open tool → Fraction Calculator Add, subtract, multiply and divide fractions, simplify, and convert decimals to fractions. Open tool → Currency Converter Convert between currencies using live European Central Bank exchange rates. Open tool → VAT & Sales Tax Calculator Add or remove VAT, GST or sales tax and see the net, tax and gross amounts. Open tool → Compound Interest Calculator See how savings grow with compound interest and regular contributions, year by year. Open tool → Inflation Calculator See how prices change over time with US CPI data, or project with a custom inflation rate. Open tool → Credit Card Payoff Calculator See how long and how much interest to clear a card balance, or the payment you need. Open tool → Debt Payoff Calculator Plan debt-free with the snowball or avalanche method and see your payoff date and interest. Open tool → Salary Calculator Convert pay between hourly, daily, weekly, monthly and yearly, with an optional tax. Open tool → BMI Calculator Calculate your Body Mass Index in metric or imperial, with your healthy weight range. Open tool → Calorie & BMR Calculator Calculate your BMR and daily calories (TDEE) for maintenance, loss or gain. Open tool → Ideal Weight & Body Fat Calculator Find your ideal weight by four formulas and estimate body fat with the US-Navy method. Open tool → GPA Calculator Calculate your weighted GPA from course credits and grades, with cumulative support. Open tool → Aspect Ratio Calculator Scale width and height to keep a ratio, or find the simplified aspect ratio. Open tool → Age Calculator Find exact age in years, months and days from a date of birth, plus totals. Open tool → Date Difference Calculator Calculate the time between two dates in years, months, days, weeks and hours. Open tool → Time Duration Calculator Find the time between two times, add or subtract time, or the span between two date-times. Open tool → Days Until Date Calculator A live countdown of days, hours, minutes and seconds until any date you choose. Open tool → Unit Converter Convert length, weight, temperature, area, volume, speed and data units. Open tool → Random Number Generator Generate random numbers in a range, unique or with decimals, one or in bulk. Open tool → Random Picker Pick random names from a list, spin a wheel, roll dice or flip a coin, fairly. Open tool → Roman Numeral Converter Convert numbers to Roman numerals and back, with validation, both directions. Open tool → Number to Words Converter Convert any number into English words, for cheques, invoices and learning. Open tool → Online Timer & Stopwatch A countdown timer, stopwatch with laps and a Pomodoro cycle, with a beep alert. Open tool → Tally Counter Online click counter that remembers its value; count up or down by any step. Open tool → Reaction Time Test Wait for green, then click fast — measures your reaction in milliseconds, best and average. Open tool → Online Alarm Clock See the current time and set alarms with labels that ring in your browser. Open tool → CPS Test Click speed test — measure your clicks per second, with your best score kept. Open tool → Profit Margin Calculator Get profit, margin % and markup from cost and price, or price from a target margin. Open tool →

🧑‍💻 Developer

32
JSON Formatter & Validator Beautify, validate and minify JSON in your browser, with syntax highlighting. Open tool → JSON to YAML Converter Convert between JSON and YAML in both directions, with clear error messages. Open tool → JSON to TypeScript Generate TypeScript interfaces from any JSON, with nested types and arrays. Open tool → XML to JSON Converter Convert XML to JSON and JSON back to XML, with pretty printing, in your browser. Open tool → SQL Formatter Format and beautify SQL queries, with dialect options and a copy button. Open tool → XML Formatter Beautify, minify and validate XML entirely in your browser. Open tool → Markdown to HTML Write Markdown and get a live HTML preview and the HTML source to copy. Open tool → Markdown Table Generator Build a Markdown (or HTML) table in an editable grid, with alignment and CSV import. Open tool → CSS / JS / HTML Minifier Minify CSS, JavaScript and HTML: strip comments and whitespace, see bytes saved. Open tool → Base64 Encode/Decode Convert text to and from Base64 with full Unicode support. Open tool → JWT Decoder Decode a JSON Web Token's header and payload in your browser, with readable dates. Open tool → JWT Generator Build and sign a JSON Web Token (HS256/384/512) from a header, payload and secret. Open tool → Hash Generator Compute MD5, SHA-1, SHA-256, SHA-512 and CRC32 of any text. Open tool → Bcrypt Generator & Verifier Hash a password with bcrypt and verify against a bcrypt hash. Open tool → AES Text Encryption Encrypt and decrypt text with a passphrase using AES-GCM in your browser — fully offline. Open tool → UUID Generator Generate cryptographically random version-4 UUIDs (GUIDs), one or in bulk. Open tool → Regex Tester Test and debug regular expressions with live match highlighting and capture groups. Open tool → Diff Checker Compare two blocks of text and highlight added, removed and changed lines. Open tool → URL Encoder / Decoder Percent-encode and decode text, query parameters and full URLs, with Unicode support. Open tool → HTML Entity Encoder / Decoder Escape and unescape HTML special characters and entities. Open tool → Binary Translator Convert text to binary and binary back to text (UTF-8), with decimal and hex too. Open tool → JSON to CSV & CSV to JSON Convert a JSON array to CSV and CSV back to JSON, in your browser. Open tool → CSV to Excel Converter Convert CSV to Excel (.xlsx) and Excel back to CSV, right in your browser. Open tool → Cron Expression Explainer Translate a cron expression to plain English and preview the next run times. Open tool → Epoch & Timestamp Converter Convert a Unix timestamp to a date and back — seconds or milliseconds, UTC and local. Open tool → Number Base Converter Convert numbers between binary, octal, decimal, hex and any base from 2 to 36. Open tool → Chmod Calculator Calculate Unix file permissions in octal and symbolic, both ways. Open tool → Mock Data Generator Generate fake JSON test data from a custom schema, for development and QA. Open tool → .gitignore Generator Build a .gitignore from languages, frameworks, editors and operating systems. Open tool → ASCII Table All 128 ASCII codes with decimal, hex, octal and binary — searchable, click to copy. Open tool → Keyboard Tester Press keys and see them light up — find dead or stuck keys on your keyboard. Open tool → 2FA Code Generator Generate time-based one-time passwords (TOTP) from a secret key, in your browser. Open tool →

🖼️ Image & Media

19
Image Compressor Compress JPEG, PNG and WebP images and cut file size, right in your browser. Open tool → Image Resizer Resize images to any width and height, with aspect-ratio lock. Nothing uploads. Open tool → Image Format Converter Convert images between PNG, JPG and WebP in your browser, with a quality control. Open tool → Image Cropper Crop and rotate an image to any size or aspect ratio and download it, in your browser. Open tool → Image Watermark Add a text watermark to an image with position, opacity and rotation — nothing is uploaded. Open tool → Meme Generator Add classic top and bottom meme text to any image and download it, in your browser. Open tool → SVG to PNG Converter Convert an SVG file or SVG code to a PNG or JPG image at any scale, in your browser. Open tool → Favicon Generator Create favicons in all sizes from an image or a letter, with the HTML snippet. Open tool → Image to Base64 Encode an image to a Base64 data URI for CSS or HTML, and decode it back. Open tool → Signature Pad Draw your signature and download it as a transparent PNG, with mouse or touch. Open tool → Image to PDF Converter Combine JPG and PNG images into a single PDF, reorder pages and pick the page size. Open tool → PDF to JPG Converter Convert each page of a PDF into a JPG or PNG image and download them, in the browser. Open tool → Merge PDF Combine several PDF files into one, in any order, entirely in your browser. Open tool → Split PDF Extract a page range, split into single pages, or split every N pages — in your browser. Open tool → Text to PDF Converter Turn plain text into a clean, paginated PDF with your page size and font — all local. Open tool → Invoice Generator Create a professional invoice with line items and tax, and download it as a PDF. Open tool → QR Code Generator Turn any URL or text into a downloadable QR code, in your browser. Open tool → QR Code Scanner Scan a QR code live from your camera or from an uploaded image, in the browser. Open tool → Barcode Generator Generate CODE128, EAN, UPC, CODE39 and more barcodes and download PNG or SVG. Open tool →

✍️ Text

15
Word & Character Counter Count words, characters, sentences, paragraphs and reading time as you type. Open tool → Online Notepad A distraction-free notepad that auto-saves in your browser, with word count and .txt download. Open tool → Typing Speed Test Measure your typing speed in WPM with live accuracy on short passages, in your browser. Open tool → Text to Speech Read any text aloud with adjustable voice, speed and pitch, using your device voices. Open tool → Word Frequency Counter See how often each word appears, ranked with counts and percentages. Open tool → Find and Replace Replace text in bulk with match-case, whole-word and regex options. Open tool → Readability Checker Flesch Reading Ease and grade level for your text, live as you type. Open tool → Case Converter Convert text between camelCase, snake_case, kebab-case, Title Case and more. Open tool → Text Tools & Cleaner Sort, dedupe, trim, clean and transform lines of text, with live word and line counts. Open tool → Morse Code Translator Translate text to Morse code and back, with audio playback and a visual flash. Open tool → Slug Generator Turn any text or title into a clean, URL-friendly slug, live as you type. Open tool → Lorem Ipsum Generator Generate Lorem Ipsum placeholder text by paragraphs, sentences or words. Open tool → Upside Down Text Flip your text upside down with Unicode, plus a backwards version — copy & paste. Open tool → Password Generator Create strong random passwords with a strength meter. Nothing stored. Open tool → Password Strength Checker Test how strong a password is with entropy and crack-time estimates — fully offline. Open tool →

🎨 Web & CSS

10
CSS Gradient Generator Build linear and radial CSS gradients visually and copy the CSS. Open tool → CSS Box-Shadow Generator Design CSS box-shadows with a live preview and copy the generated CSS. Open tool → CSS Border Radius Generator Design rounded corners visually with per-corner control and copy the CSS border-radius. Open tool → CSS Flexbox Generator Build CSS flexbox layouts visually with a live preview and copy the generated CSS. Open tool → Cubic Bezier Drag handles to build a CSS easing curve and copy the cubic-bezier() value. Open tool → Color Converter Convert colors between HEX, RGB and HSL with a live preview and picker. Open tool → Color Contrast Checker Check the WCAG contrast ratio of two colors and whether they pass AA and AAA. Open tool → Color Picker from Image Upload an image and pick any pixel as HEX, RGB and HSL, plus a dominant palette. Open tool → Color Palette Generator Generate complementary, analogous, triadic and more color schemes from any base color. Open tool → PX to REM Converter Convert between px, rem and em at any root font-size, with a quick reference table. Open tool →

🌐 Network & SEO

15
IP Address Lookup Country, city, coordinates, time zone and ISP/ASN for any IP address. Open tool → My IP Address See your public IP address, location, ISP and browser instantly. Open tool → SSL Certificate Checker Read a domain's SSL certificate: issuer, expiry, days left and covered hosts. Open tool → IP Subnet Calculator Calculate network, broadcast, mask, host range and count from an IP and CIDR. Open tool → Time Zone Converter Convert a date and time between any two time zones, with live UTC offsets. Open tool → HTTP Status Codes A searchable reference of every HTTP status code with its name and meaning. Open tool → User-Agent Parser Parse a User-Agent string into browser, engine, OS and device, instantly. Open tool → Meta Tag Generator Generate SEO, Open Graph and Twitter meta tags for your page. Open tool → UTM Link Builder Build UTM-tagged campaign URLs for Google Analytics with source, medium and campaign. Open tool → robots.txt Generator Create a valid robots.txt with allow/disallow rules, crawl-delay and a sitemap line. Open tool → Open Graph Preview & Generator Preview how your link looks on social media and generate the Open Graph and Twitter meta tags. Open tool → Email Validator Check if an email address is valid in format, single or in bulk, with typo suggestions. Open tool → Country Codes Directory Dialing code, ISO 3166 country code and ISO 4217 currency for every country, grouped by continent. Open tool → Find Facebook ID Get the numeric Facebook profile, page, group or post ID from a URL. Open tool → Free Proxy List Live, auto-updating list of free HTTP & SOCKS proxies by country, with anonymity, uptime and speed. Open tool →

🧰 More Tools

1
Browser Extensions Free PAYATE Chrome extensions — install them from the Chrome Web Store. Open tool →

No tools match your search.

Frequently asked questions

What can I do with the PAYATE tools?

PAYATE offers a suite of free, browser-based tools for developers, QA engineers and merchants: validate and mask card numbers, look up a BIN, and generate synthetic test cards, addresses and profiles. Every tool runs format/mathematical checks only — no real card is contacted and nothing is stored.

Are the generated card numbers real?

No. All generated numbers are synthetic test data. They may pass the Luhn checksum so they are shaped like real cards, but they are not linked to any account and cannot be used for payments. They are for development, testing and learning only.

Which tool should I use?

Use Card Validator or Luhn Checker to check a number, BIN Lookup to identify a card's bank and scheme, and the Card / Visa / Bulk Generators to create test data. Address Generator adds fictional profiles for full test records.

Do the tools store or send my data?

No. The tools perform their checks to compute a result for that request and do not save anything to a database, log or third party. For anything sensitive, prefer the built-in example and test values.

Are the PAYATE tools free?

Yes. Every tool listed here is completely free to use in the browser, with no sign-up required.