Age Calculator is a free online tool that works out exactly how old someone is. Pick a birth date, optionally set the reference date (it defaults to today), and the tool returns the precise age in years, months and days rather than a rough number. It also shows the total number of days, weeks and months lived, which is useful for milestone planning, retirement questions, contest eligibility or simply settling an argument about age. ...
Base64 Encode & Decode is a free online tool for converting plain text to Base64 and back. Base64 is the standard encoding used everywhere — API authentication headers, JWT payloads, email attachments, data URIs and many configuration formats. With this tool you can encode a message into Base64 in one click, or decode an existing Base64 string into readable text, with correct Unicode and UTF-8 handling for characters like emoji and non-Latin scripts. ...
Binary Hex Decimal Converter is a free online tool that translates a number between the four most common bases in one step. Enter any value, pick whether it is binary (base 2), octal (base 8), decimal (base 10) or hexadecimal (base 16), and the page instantly shows the equivalent in all four bases. The binary output is grouped into tidy 4-digit chunks so long bit strings stay readable. Because it uses JavaScript BigInt, this converter handles very large values far beyond the safe integer limit, which makes it useful for memory addresses, file sizes, bit masks and low-level debugging where rounding would give the wrong answer. ...
BMI Calculator is a free online tool that computes your Body Mass Index using the standard formula and the WHO classification bands. Enter your height and weight in metric units (centimeters and kilograms) or switch to imperial units (feet, inches and pounds), and it returns your BMI rounded to two decimals, your category (underweight, normal weight, overweight or obese), and the healthy weight range for your height. BMI is a quick population-level screening measure rather than a diagnosis, and this tool makes the math instant so you can compare it against clinical bands without a spreadsheet. ...
Case Converter is a free online tool that rewrites your text into any naming convention with one click. Paste a sentence, variable name, heading or slug draft, then choose from UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case or kebab-case. It is the fastest way to turn “hello world from portala” into helloWorldFromPortala, HelloWorldFromPortala, hello_world_from_portala or hello-world-from-portala without hand-editing every word. This is especially handy for developers renaming variables, writers polishing headings, and anyone preparing URL slugs or config keys. ...
Color Contrast Checker is a free online accessibility tool that measures the contrast ratio between a foreground and a background color and tells you whether they meet the WCAG 2.1 standards. Enter two hex colors (or use the color pickers) and get the ratio alongside clear pass/fail verdicts for normal text (AA needs 4.5:1, AAA needs 7:1) and large text (AA needs 3:1, AAA needs 4.5:1). The ratio follows the official relative-luminance formula, the same method used by professional accessibility auditors, so the result matches what Lighthouse and similar checkers report. It is the fastest way to confirm your text remains readable before shipping a design. ...
Cron Expression Parser is a free online tool that turns cryptic cron strings into plain English. Paste a standard 5-field (or 6-field) cron expression, click Parse, and it describes each field in words — minutes, hours, days of month, months and days of week — then lists the next five execution times in your local time. It understands wildcards (*), ranges (1-5), lists (0,30), steps (*/5) and mixed forms, so 0 12 * * 1-5 becomes “at 12 hours, weekdays” instead of a guessing game. ...
CSV to JSON Converter is a free online tool that transforms comma-separated values into a clean JSON array of objects. Paste your CSV, decide whether the first row is a header, and press Convert to get nicely indented JSON ready to drop into code or an API. If the first row holds column names, each row becomes an object keyed by those names; otherwise generic column keys are used. The parser correctly handles quoted fields, escaped double quotes and commas that live inside quoted values, so messy exports from spreadsheets still parse correctly. Copy puts the JSON on your clipboard, and Example loads a small sample so you can try it immediately. ...
CSV Viewer is a free online tool that turns comma-separated text into a readable table instantly. Paste a CSV dump, a spreadsheet export or a log fragment, click Parse, and the data is rendered as a styled grid. The parser understands quoted fields, so values that contain commas, quotes or embedded newlines are split correctly instead of breaking the columns. After parsing, it reports how many rows and columns were detected so you can sanity-check the result at a glance. ...
Data Size Converter is a free online tool that converts digital storage sizes between units on the binary (1024-based) scale. Enter a value, choose the unit you are converting from and the one you want, and get the result instantly. It supports bytes through petabytes - B, KB, MB, GB, TB and PB - and also shows the value converted into every other unit so you can see the whole picture at once. ...
Date Difference Calculator is a free online tool that tells you exactly how much time lies between two dates. Pick a start date and an end date, and the tool returns a calendar-aware duration broken into years, months and days, alongside the total number of days and the equivalent in weeks. It accounts for leap years and month lengths, so the result matches how people naturally count time rather than just subtracting raw timestamps. ...
Discount Calculator is a free online tool that instantly works out the real price after a percentage markdown. Enter the original price and the discount percentage, and the tool shows you exactly how much money you save and what you actually pay at checkout. It is handy for sales, coupons, promo codes and comparing two discounted products at a glance. The math is straightforward: the discount amount is the original price multiplied by the percentage, and the final price is the original price minus that amount. The result updates as you type, so you can experiment with different percentages to see where a sale becomes a good deal. ...
HEX to RGB Color Converter is a free online tool that translates between the two most common ways to write a color on the web. Enter a #RGB or #RRGGBB hex value and you instantly get its red, green and blue components, a ready-to-use rgb(...) CSS string, and a live swatch so you can see the color at a glance. Reverse the conversion with the RGB inputs to get a hex value back. ...
HTML Entity Encoder / Decoder is a free online tool that converts between raw text and HTML entities in both directions. Press Encode to escape the characters that break markup — &, <, >, " and ' — into their safe entity forms such as &, < and >. Press Decode to reverse it, turning named entities ( , ", <) and numeric entities ({, {) back into the characters they represent. ...
JSON Formatter & Validator is a free online tool that beautifies, validates and minifies JSON documents in a single click. Paste any JSON payload, press Format, and get clean, correctly indented output that is easy to read and debug. The built-in validator checks your input against strict JSON syntax and pinpoints exactly where a problem occurs, so broken API responses, config files or data dumps stop being a guessing game. ...
JSON Minifier is a free online tool that compresses a readable JSON document into a single tightly packed line by stripping every unnecessary space, tab and newline. Minified JSON is the format you want when you send payloads over APIs, store configuration, or squeeze data into databases and browser storage where every byte counts. Because the tool parses your input as real JSON before compressing it, it also doubles as a lightweight syntax checker: if your JSON is malformed, you get a clear error message instead of a broken output. No silent corruption, no surprises. ...
JSON String Escape / Unescape is a free online helper for turning raw text into a safe JSON string value and back. When you put text inside JSON, characters like quotes, backslashes and newlines must be escaped - and doing that by hand is error-prone. This tool does it for you: paste a sentence to escape it into a \", \\ and \n safe form, or paste an escaped value to read the original text back. ...
JSON to CSV Converter is a free online tool that turns a JSON array of flat objects into a CSV you can open directly in Excel, Google Sheets or any spreadsheet. Paste your JSON, press Convert, and get a header row built from the union of every object’s keys, followed by one row per object. Fields containing commas, quotes or newlines are automatically quoted and escaped to keep the file valid. ...
JWT Decoder is a free online tool that lets you inspect a JSON Web Token without sending it to anyone. Paste a JWT and the tool splits it into its three parts — header, payload and signature — and pretty-prints the header and payload as readable JSON. If the token carries exp or iat claims, it also translates those epoch seconds into human-readable UTC dates so you can instantly tell when the token was issued and when it expires. ...
Length Converter is a free online tool that converts between common distance and length units. It supports millimetres, centimetres, metres and kilometres on the metric side, and inches, feet, yards and miles on the imperial side. Type a number, choose the unit you have and the unit you want, and the converted length appears immediately. All conversions are computed locally in your browser. Nothing is uploaded or stored, so you can switch between metric and imperial for plans, recipes, travel or school work without sending your numbers anywhere. ...
Line Counter is a free online tool that counts the lines in your text as you type. It reports the total number of lines, the number of lines that actually contain content (ignoring blank ones) and the total character count in one quick glance. That makes it handy for checking log files, source code, word lists, CSV rows and any data where empty lines matter and should not be counted twice. ...
Loan Calculator is a free online tool that estimates the monthly payment and total cost of a loan before you commit. Enter the principal amount, the annual interest rate and the term in years, and the tool computes the monthly installment using the standard amortizing loan formula, along with the total interest you will pay and the total amount repaid over the life of the loan. It works for personal loans, auto loans, student loans and mortgages alike. Comparing different rates or terms is as simple as changing a number - watch the monthly payment and total interest shift in real time so you can weigh a shorter, higher payment against a longer, cheaper monthly bill. ...
Lorem Ipsum Generator is a free online tool that creates classic placeholder text for mockups, wireframes and layout demos. Choose how many paragraphs you need and roughly how many words each should contain, then press generate to get a block of standard Cicero-style dummy text. It is the fast way to fill a design before the real copy is ready, without writing filler by hand. The text is generated locally in your browser, so nothing is uploaded or tracked - you can experiment with lengths freely without sending anything anywhere. ...
Markdown Previewer is a free online tool that renders Markdown into formatted HTML as you type. Write your text on the left — headings, bold, italic, links, lists, code blocks, tables and quotes all supported — and watch the rendered result update instantly on the right. It is the fastest way to check how a README, a blog post or a document will look before you publish it. A Show HTML toggle reveals the raw HTML the Markdown produces, which is useful if you need to copy the markup into a CMS or inspect exactly what the parser generated. A sample document is loaded by default so you can see every feature in action immediately. ...
MD5 Hash Generator is a free online tool that computes the 128-bit MD5 message digest of any text and shows it as a 32-character hexadecimal string. MD5 is still widely used as a quick checksum and for legacy systems, file-integrity checks and lookups, so having an instant local generator is handy when you need to fingerprint a string on the spot. Type or paste your text, press Generate, and the hex digest appears ready to copy. Because it runs entirely in your browser, the text you hash never travels over the network — nothing is uploaded, logged or stored, which matters when you are hashing secrets or private strings. ...
Morse Code Translator is a free online tool that converts plain text to Morse code and Morse back into readable text. It uses the standard ITU alphabet covering all letters A to Z, digits 0 to 9 and the most common punctuation marks. In Morse output, letters are separated by a space and whole words by a slash, so the result is unambiguous and easy to read. Whether you are learning the code, sending a hidden message, or just curious what “SOS” looks like, the translator handles both directions. Type text and hit Text to Morse, or paste dots and dashes and hit Morse to Text to decode it back. Copy puts the output on your clipboard. ...
Online Timer & Stopwatch is a free timing page that combines two tools in one. On the left, a countdown timer lets you set minutes and seconds and count down to zero, showing a clear “Time’s up!” message when it finishes. On the right, a stopwatch counts up and records lap splits so you can measure intervals like workouts, cooking or tasks. Both clocks run entirely in your browser, using your device clock and no audio. There is nothing to download, no account and no data sent anywhere - open the page and start timing. ...
Percentage Calculator is a free online tool that answers the three percentage questions people actually ask every day. Pick a mode: What is X% of Y? for tips, discounts and tax; X is what percent of Y? for shares and ratios; or Percentage change from X to Y for growth charts, price increases and differences. Enter the numbers and the result appears immediately, rounded to two decimals. It avoids the common confusion between “percentage of” and “percentage change”, so you do not have to remember which formula to reach for. ...
QR Code Generator is a free online tool that turns any text or URL into a scannable QR code, drawn right on a canvas in your browser. Type a link, a Wi-Fi credential, plain text or any short payload, choose an error-correction level, and a crisp QR code appears that you can point any phone camera at. When you are happy with it, use Download PNG to save the image. ...
Random Number Generator is a free online tool that produces random integers inside any range you choose. Enter a minimum and a maximum value (negatives are fully supported), decide how many numbers you want up to 100, and press Generate. Every result is guaranteed to fall inside the inclusive range you set, so it is safe for prize draws, dice rolls, picking a winner, sample selection or any task where bounds matter. ...
Random Password Generator is a free online tool that creates strong, unpredictable passwords using the same cryptographically secure random number generator your browser uses for TLS and banking sessions. Unlike weak Math.random() generators, it uses crypto.getRandomValues, so the output is genuinely hard to guess. Set the length, choose which character groups to include, optionally exclude ambiguous look-alike characters, and get a fresh password every time you press Generate. A built-in strength label scores the result so you know at a glance whether it is good enough for a sensitive account. ...
Regex Tester is a free online tool that lets you write a regular expression and instantly see how it behaves against a sample string. Enter a pattern, pick your flags, paste the text you want to search, and the tool lists every matched substring together with its starting position in the string, plus a total match count. Iterating on a pattern this way is far faster than editing code and running it repeatedly. ...
Remove Duplicate Lines is a free online cleaner that strips repeated rows out of lists, logs, exports and copied data. It keeps the first occurrence of every line and tells you exactly how many duplicates it removed. You can choose whether matching should be case-sensitive and whether extra leading or trailing whitespace should be ignored first, so Paris and paris are treated as the same entry when you want them to be. ...
Roman Numeral Converter is a free online tool that converts between Arabic numbers and Roman numerals in both directions. Type any whole number from 1 to 3999 and it produces the classic Roman form (for example 1999 becomes MCMXCIX); or paste a Roman numeral like MMXXVI and it decodes it back to an Arabic number. It validates the range and the format, so out-of-range values and malformed numerals are rejected with a clear message instead of silently giving a wrong answer. ...
SHA-256 Hash Generator is a free online tool that computes the 256-bit SHA-2 secure hash of any text and renders it as a 64-character lowercase hexadecimal digest. SHA-256 is the workhorse algorithm behind TLS, blockchain, checksum verification and password hashing, so being able to compute it locally is essential for developers and security work. The hashing is performed by your browser’s built-in Web Crypto API, which is fast and uses hardware acceleration. While the digest is being computed, the status line shows Generating… so you know the tool is working even on longer inputs. ...
SHA-512 Hash Generator is a free online tool that computes the 512-bit SHA-2 secure hash of any text and renders it as a 128-character lowercase hexadecimal digest. SHA-512 offers a larger output and stronger security margin than SHA-256, which makes it a common choice for high-integrity checksums, certificate signatures and hardened password hashing. Like the SHA-256 tool, the hashing is done by your browser’s built-in Web Crypto API — no third-party server is involved. The status line shows Generating… while the digest is being produced, so long inputs still feel responsive. ...
Speed Converter is a free online tool that converts speed between the units you actually encounter in daily life. Enter a value, pick the unit you are starting from and the target unit, and get an accurate result in seconds. It covers metres per second, kilometres per hour, miles per hour, knots and feet per second - the units used on roads, in running apps, aviation and sailing. The conversions are built on exact reference factors, so 60 mph comes out at the familiar highway cruising speed in km/h, and knots convert to the precision expected in nautical contexts. Swap the from and to units with one click of the selects and the result updates as you type. ...
SVG Previewer is a free online tool that renders Scalable Vector Graphics markup right in your browser. Paste an SVG document into the box, hit render, and you see exactly how the vector drawing looks without opening a separate editor. It is ideal for checking icons, logos, simple illustrations and chart exports before you embed them in a page or save the file. Everything happens locally on your device. Your SVG code is not uploaded to any server, so you can preview work-in-progress graphics and proprietary icons safely. ...
Temperature Converter is a free online tool that converts between Celsius, Fahrenheit and Kelvin in real time. Type a value, pick the scale it is in and the scale you want, and the result updates instantly. As a bonus it also shows all three scales side by side so you can see how a number maps across units at a glance. The math is done locally in your browser. No value is uploaded or stored, so you can convert cooking temperatures, weather readings or physics problems without sending anything to a server. ...
Text Diff Checker is a free online tool that compares two blocks of text line by line and highlights exactly what changed. Paste your original version on the left and the revised version on the right, press Compare, and get a clear side-by-side style result where removed lines are marked with -, added lines with +, and unchanged lines are shown without a marker. A small summary tells you how many lines were added, removed and left untouched. ...
Text Line Sorter is a free online tool that rearranges the lines of any list with one click. Pick from five modes: alphabetical A to Z, reverse alphabetical Z to A, natural order (so item2 sorts before item10), simple reverse of your current order, or a random shuffle. It works on names, words, URLs, tags and any newline-separated list you paste in. Sorting is done locally in your browser - nothing is uploaded or logged, which keeps your lists private whether they contain usernames, products or working notes. ...
Tip Calculator is a free online tool that makes splitting a restaurant bill quick and painless. Enter the bill amount, pick a tip percentage with the preset buttons (10%, 15%, 18% or 20%) or type a custom value, and set how many people are sharing. The tool instantly shows the tip amount, the grand total and exactly what each person owes, rounded to two decimals. It is built for real tables: whether you are tipping on a single coffee or dividing a group dinner, the split math stays accurate down to the cent. You can tweak the tip percentage or the number of diners on the fly and watch the per-person total update. ...
Unix Timestamp Converter is a free online tool that translates between epoch timestamps and human-readable date-time values. A Unix timestamp is the number of seconds that have elapsed since 1970-01-01 00:00:00 UTC, and it is the format APIs, logs and databases use constantly. This converter turns that number into a clear UTC and local date-time, and reverses the process by converting a date-time picker value back into seconds. It accepts both seconds and milliseconds — tick the milliseconds box for values like 1700000000000 — and includes a Now button that drops in the current time so you can see the live epoch value in one click. ...
URL Encoder / Decoder is a free online tool for converting text into a URL-safe percent-encoded form and back. URLs can only contain a limited set of ASCII characters, so spaces, accents, emoji and symbols like &, =, ? and # must be escaped as %XX sequences before they travel safely in a query string or path. This tool handles that escaping with the standard encodeURIComponent rules and reverses it on demand. ...
URL Slug Generator is a free online tool that turns any title into a clean, SEO-friendly web slug. Type a heading or phrase, and the tool instantly produces a lowercase slug: accents and diacritics are stripped so “Café” becomes “cafe”, any non-alphanumeric characters collapse into single hyphens, and leading or trailing hyphens are trimmed. The result is the kind of short, readable URL segment used by blogs, docs and e-commerce sites. ...
UUID Generator is a free online tool that creates random Universally Unique Identifiers (UUID) version 4 in bulk. UUIDs are the standard 128-bit identifiers used across databases, API keys, session tokens, filenames and distributed systems where collisions must be effectively impossible. Pick how many IDs you need, click Generate, and get a fresh list ready to paste straight into your code or database. Every ID is generated with the Web Crypto API using cryptographically secure randomness, so the output carries the same collision guarantees as UUIDs produced by server-side libraries. The tool falls back to a manual v4 construction if the runtime offers only crypto.getRandomValues, keeping the result standards-compliant everywhere. ...
Weight Converter is a free online tool that converts between metric and imperial weight units. It handles milligrams, grams, kilograms and tonnes, as well as ounces and pounds, so you can switch between systems for cooking, shipping, science or everyday shopping. Enter a number, choose the unit you are converting from and the unit you need, and the result updates right away. The calculation runs entirely in your browser. No weight is uploaded, sent to a server or saved, which makes it safe and quick for any amount you want to convert. ...
Whitespace Remover is a free online cleaner that fixes awkward spacing in copied text. It can strip every space, tab and newline out of a block, collapse runs of multiple spaces into a single space, trim the edges of each line, or just tidy the outer edges of the whole text. It is useful when you paste from PDFs, spreadsheets or websites and end up with double spaces, stray indentation and trailing gaps. ...
Word Counter is a free online tool that counts your text in real time. Paste or type into the box and you instantly see the number of words, total characters, characters without spaces, sentences, paragraphs and an estimated reading time based on a comfortable 200 words per minute. It is built for writers, students, bloggers and marketers who need to stay under a length limit for essays, ads, meta descriptions or social posts. ...
XML Formatter & Beautifier is a free online tool that pretty-prints and validates XML documents right in your browser. Paste a flat or tangled XML snippet, press Format, and it is re-indented into a clean tree you can actually read. The built-in validator walks the document on a tag stack, correctly ignoring XML declarations, comments (<!-- -->), CDATA sections (<![CDATA[ ]]) and processing instructions (<? ?>), and reports exactly which tag is mismatched or unclosed when something is wrong. ...