All tools
Every Voolza tool, grouped by category. All free, all in your browser.
A fast keyboard-friendly calculator with a running history tape you can reuse.
Trig, logs, powers, roots and factorials with degree/radian modes and a history tape.
Work out X% of Y, what percent one number is of another, and percentage change.
Calculate a tip and split the bill (and the tip) evenly across any number of people.
Add, subtract, multiply and divide fractions with simplified, mixed and decimal results.
Raise any base to any power, including negative and fractional exponents.
Find square roots and nth roots, with a simplified radical form.
Split an itemised bill across people with uneven shares, plus tax and tip.
Find the sale price and savings from a percentage or fixed discount, with tax.
Paste numbers to get mean, median, mode, range, sum and standard deviation.
Calculate your Body Mass Index from height and weight, in metric or imperial, with your healthy-weight category.
Work out the monthly payment, total interest and total cost of a loan or mortgage from the amount, rate and term.
Calculate your loan EMI with a full amortisation schedule and see how monthly prepayments cut interest and tenure.
Project the future value of a monthly SIP with optional annual step-up, and compare it against a lumpsum investment.
Work out fixed-deposit maturity and interest for any amount, rate, tenure and compounding frequency.
Estimate recurring-deposit maturity and total interest from your monthly deposit, rate and tenure.
See how a principal grows with compound interest, optional monthly contributions and any compounding frequency.
See how inflation raises future prices and erodes the purchasing power of money over time.
Find how large an emergency fund you need from your monthly expenses, and how much more to save to reach it.
Add or remove GST at any rate and see the base value, GST amount and the CGST/SGST split instantly.
Estimate your Indian income tax under the new and old regimes for FY 2025-26, and see which one saves you more.
Convert your annual CTC to monthly in-hand salary, with a breakdown of PF, professional tax and income tax.
Calculate a credit-weighted GPA or CGPA from your course grades and convert it to a percentage.
Format, validate and minify JSON with precise error locations and key sorting.
Convert between JSON and YAML in either direction, instantly.
Generate TypeScript interfaces from a JSON sample, with nested types inferred.
Convert a JSON array of objects to CSV, or CSV back to JSON — both directions, with download. Runs in your browser.
Encode text to Base64 or decode Base64 back to text, with URL-safe support.
Percent-encode or decode text for safe use in URLs, in component or full-URI mode.
Escape text to HTML entities or decode named and numeric entities back to text.
Convert UTF-8 text to its hexadecimal bytes and back, with custom separators.
Decode a JSON Web Token's header and payload and inspect its time claims. No verification.
Convert text between camelCase, snake_case, kebab-case, PascalCase and more.
Turn any text into a clean, URL-friendly slug.
Sort lines alphabetically or numerically, ascending or descending, with optional dedupe.
Remove duplicate lines, optionally ignoring case or trimming whitespace.
Count words, characters, lines, sentences and paragraphs, with reading time.
A free, distraction-free online notepad that autosaves to your browser. Jot notes, drafts and lists — private, offline, no sign-up.
Test regular expressions live with match highlighting, capture groups and flag toggles.
Build a regular expression from visual blocks and ready-made presets, then test it live against your own text.
Generate placeholder paragraphs, sentences or words of lorem ipsum.
Compare two blocks of text and highlight added and removed lines or words.
Convert Markdown (GitHub-flavored) into clean HTML source.
Convert an HTML fragment back into clean, readable Markdown.
Beautify JavaScript, TypeScript, JSON, CSS, HTML, Markdown, YAML and GraphQL with Prettier.
Format and beautify SQL queries with proper indentation and keyword casing, for MySQL, PostgreSQL, SQL Server and more.
Minify CSS, JavaScript and HTML to shrink file size — strips comments and whitespace, with a before/after size comparison.
Resize and crop any image to Instagram, X, LinkedIn, YouTube and Open Graph presets, then export PNG or JPG.
Resize images and convert between PNG, JPEG and WebP with a quality slider — all in your browser.
Encode any image as a Base64 data URI, with ready-to-paste CSS and HTML snippets.
Compress JPG, PNG or WebP images to a smaller file size right in your browser, with quality and resize controls. No upload.
Strip comments, metadata and whitespace from SVG markup to shrink its size.
Generate all the favicon and app-icon sizes from one image, with the HTML and manifest.
Make a spoof BREAKING NEWS image with your own photo, headline, scrolling ticker and channel branding — then download it to share.
Draw your signature and place it anywhere on a PDF, then download the signed file — nothing is uploaded.
View and edit a PDF's title, author, subject and keywords — or strip all metadata before sharing.
Combine several PDFs into one, in any order — processed entirely in your browser.
Extract a range of pages from a PDF into a new document, fully client-side.
Rotate every page of a PDF by 90, 180 or 270 degrees.
Combine images into a single PDF, one image per page.
Stamp a text watermark over every page of a PDF (or Word file) — adjust the colour, opacity, size, angle and tiling, then download. Nothing uploaded.
Convert each page of a PDF into a high-resolution JPG or PNG image, then download them — all in your browser, no upload.
Add page numbers to a PDF — choose the style (1, Page 1, 1 of N), position, starting number and size, then download.
Remove pages from a PDF or rearrange their order using page thumbnails, then download the edited file. Nothing is uploaded.
Drag a signature, logo or image onto a PDF page, resize it and download — a quick, private way to sign or stamp a document.
Reduce a PDF's file size in your browser with adjustable quality and resolution — best for scanned or image-heavy PDFs.
Extract tables from a PDF into an Excel spreadsheet or CSV — detected automatically, entirely in your browser.
Convert a Word (.docx) document to PDF entirely in your browser — nothing is uploaded.
Extract a PDF's text into an editable Word (.doc) document, client-side. Best-effort layout.
Convert an Excel (.xlsx/.xls) spreadsheet to CSV, with multi-sheet support, in your browser.
Turn CSV data into a downloadable Excel (.xlsx) workbook, client-side.
Render HTML into a downloadable PDF with a live preview — all in your browser.
Convert between Unix timestamps and human-readable dates in every common format.
Describe a cron expression in plain English and preview its next run times.
A precise online stopwatch with lap splits and keyboard shortcuts — counts in hundredths of a second.
Run one or many countdown timers with sound and notifications when each one finishes.
Focus with the Pomodoro technique — customizable work/break cycles, sound and notifications.
Find your exact age in years, months and days — plus weeks, hours and your next birthday.
See the current time across multiple cities and time zones at once, updating live.
Pick a time in one zone and see it across everyone's time zones, with working-hours hints.
Generate random v4 or time-ordered v7 UUIDs in bulk.
Generate compact, URL-safe unique IDs with a configurable size.
Generate strong random passwords with character-class rules and a strength meter.
Generate cryptographically-strong random numbers within a range, with or without duplicates.
Create a QR code for any URL or text, customise the colours and error correction, then download it as PNG or SVG.
Generate Code 128, EAN-13, UPC, Code 39 and ITF-14 barcodes from any value and download them as PNG or SVG.
Create a professional invoice with line items, tax and discount, then download it as a PDF — no sign-up, nothing uploaded.
Add names or options and spin an animated wheel to pick one fairly at random — wheel of names, decision maker and raffle picker.
Break a URL into its protocol, host, path, query parameters and fragment.
Work out the network, broadcast, netmask, wildcard, host range and usable hosts from an IP and CIDR prefix.
Convert an IPv4 address between dotted decimal, integer, hex, octal and binary, and expand or compress IPv6.
Build trackable campaign links with utm_source, utm_medium, utm_campaign and more — then copy the tagged URL.
A searchable reference of HTTP status codes — what 200, 301, 404, 418, 500 and the rest actually mean.
Paste a User-Agent string (or use your own) to detect the browser, operating system, engine and device.
Convert colors between HEX, RGB and HSL with a live preview and picker.
Pick any colour from your screen with the eyedropper, or enter a value, and copy it as HEX, RGB or HSL.
Check the WCAG contrast ratio between a text and background color, with AA/AAA verdicts.
Build harmony palettes and a 50–900 tonal scale from a single base color.
Measure your typing speed in words per minute with live WPM, accuracy and a 15/30/60-second timer.
Test your reflexes — wait for green, then click as fast as you can. Tracks your best and average in milliseconds.
Click as many targets as you can in 30 seconds. Tracks hits, accuracy and your best score.
Slide and merge numbered tiles to reach 2048. Smooth animations, keyboard and swipe controls, best-score saving.
Flip cards to find matching pairs in as few moves as possible. Classic concentration memory game.
Slide the numbered tiles to arrange them 1–15 in order. The classic sliding-block puzzle with animated moves.
Tap only the falling dots that match the target colour before they drop. Speed ramps up — how high can you score?
A one-button arcade game: tap to reverse the ball's orbit and dodge the rotating arcs for as long as you can.
Whack-a-mole style speed game — tap the lit tile as fast as you can for 30 seconds and track your reaction time.
Preview how your page title and meta description appear in Google search, with live pixel-width truncation for desktop and mobile.
Paste your page's HTML to audit its title, description, canonical and Open Graph / Twitter tags, with a social-preview card.
Convert numbers between binary, octal, decimal and hexadecimal, even very large ones.
Paste a cURL command and get equivalent code for JavaScript fetch, Python requests or Node.js axios.
Work out Unix file permissions — toggle read/write/execute to get the octal (e.g. 755), symbolic and chmod command.
Build a .gitignore by picking your stack — Node, Python, macOS, VS Code and more — then copy or download it.