Free web utilities,
zero clutter.

What is X% of Y, X is what % of Y, and percentage change between numbers.

Calculate your grade point average on the 4.0 scale from courses and credits.

Calculate your weighted grade from assignment scores and their weights, with the letter grade.

Trig, logs, powers, roots, and factorials — a full scientific calculator in your browser.

Your exact age in years, months, days — and the difference between two dates.

Find your Body Mass Index and weight category — metric or imperial.

Your basal metabolic rate and daily calories to lose, keep, or gain weight.

Tip, total, and per-person split for any bill.

Sale price, savings, and final total with sales tax.

Add sales tax to a price or work backwards from a tax-included total.

Monthly EMI payment, total interest, and total cost of a loan.

See how savings grow with compound interest and regular contributions over time.

Estimate your monthly mortgage payment — principal, interest, tax, and insurance.

Elapsed time between two dates and times — days, hours, minutes.

Find the aspect ratio and resize width or height while keeping proportions.

Convert across 75+ categories — length, weight, temperature, data, and more.

Convert American Wire Gauge to cross-section in mm² and diameter, with the full chart.

Convert CSV to JSON and back — quoted fields, custom delimiters, and header rows.

Convert numbers to Roman numerals and back — 1 to 3999, both directions.

Convert text to Base64 and back, with full Unicode support.

Convert numbers between binary, octal, decimal, and hexadecimal.

Translate text to binary and binary back to text — UTF-8, 8-bit groups.

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text.

Percent-encode text for URLs and decode it back.

Current epoch time and conversion between timestamps and dates.

Convert a date and time between any two of the world's time zones.

Encode an image as a Base64 data URI, CSS, HTML, or Markdown.

A distraction-free notepad that autosaves in your browser — copy or download anytime.

Count words, characters, sentences, paragraphs, and reading time as you type.

Translate text to Morse code and Morse back to text, with punctuation.

Click to copy emoji, arrows, currency, math, and special characters.

UPPERCASE, lowercase, Title, Sentence, camelCase, snake_case, kebab-case.

Type text and hear it read aloud — choose a voice, speed, and pitch. Free, in your browser.

Repeat any text many times with a separator — new lines, spaces, or commas — and copy it.

Turn text into 𝐛𝐨𝐥𝐝, italic, script, bubble, and more Unicode styles to copy anywhere.

Generate placeholder text by paragraphs, sentences, or words.

Turn any title into a clean, URL-safe slug — accents stripped, hyphenated.

Compare two blocks of text line by line and see what changed.

De-duplicate, trim, clean, and sort lines of text.

Subnet & CIDR, IP conversion, signal power, and transfer time — calculators for network engineers.

UUID, ULID, CUID2, and NanoID — generate in bulk and copy.

Pretty-print, minify, and validate JSON with clear error messages.

Visualize JSON as an interactive node graph — pan, zoom, and explore nested data.

Convert YAML to JSON and JSON back to YAML, with clear error messages.

Beautify and indent SQL across PostgreSQL, MySQL, SQLite, T-SQL, and more.

Build and read cron schedules in plain English, with the next run times.

Convert Linux file permissions between 755 and rwxr-xr-x, and copy the command.

Decode a JSON Web Token's header and payload and read its claims.

Build and sign a JSON Web Token with HS256, HS384, or HS512.

Test regular expressions with live match highlighting, groups, and flags.

Build tracked campaign URLs with UTM parameters for Google Analytics — source, medium, campaign, and more.

Preview your title and meta description as a Google result, with pixel-width limits for desktop and mobile.

Generate Open Graph & Twitter Card meta tags and preview your social link card for Facebook, X, and LinkedIn.

Create an editable QR code you can re-point to a new link anytime — and track total scans by day, country, and device.

Click any colour in an image to get its HEX, RGB, and HSL code.

Convert colors between HEX, RGB, and HSL with a preview.

Check color contrast against WCAG AA and AAA accessibility standards.

Build linear and radial CSS gradients with color stops and copy the CSS.

Design a CSS box-shadow with live preview — offset, blur, spread, color, and inset.

Round each corner with a live preview and copy the CSS border-radius.

Build a CSS flexbox or grid layout visually, with a live preview, and copy the CSS.

Build complementary, analogous, triadic, and monochromatic color palettes.

Lighten and darken any color into a full range of tints and shades.

QR codes for text, URLs, Wi-Fi, email, SMS, phone, location, and calendar events.

Create Code 128, Code 39, EAN, UPC, and ITF barcodes — download as PNG.

Resize, compress, and convert images between PNG, JPEG, and WebP.

Convert iPhone HEIC and HEIF photos to JPG, PNG, or WebP.

Convert AVIF images to JPG so Windows and older apps can open them.

Convert AVIF images to PNG, keeping any transparent background.

Turn an image into favicon.ico plus every icon size and the HTML snippet.

Fill in the details and download a professional PDF invoice.

Merge PDFs, split one by page range, or turn images into a PDF.

Rotate PDF pages left, right, or 180° and save the change — in your browser, nothing uploaded.

Remove unwanted pages from a PDF by page range and download the rest — in your browser, nothing uploaded.

Rearrange PDF pages with a visual preview and download the new order — in your browser, nothing uploaded.

Stamp page numbers onto a PDF — choose the position and format. In your browser, nothing uploaded.

Add a text watermark like DRAFT or CONFIDENTIAL across every page — in your browser, nothing uploaded.

Convert PDF pages to JPG or PNG images, pick which pages, and download — in your browser, nothing uploaded.

Extract the text from a PDF and copy it or download a .txt file — in your browser, nothing uploaded.

Precise timing with lap splits — start, stop, and reset by click or key.

Countdown timer with an alarm — set hours, minutes, seconds and go.

A live countdown to any date — days, hours, minutes, and seconds until your event.

A simple task list — add, edit, complete, filter, and clear. Saved in your browser.

Add your options and spin the wheel to pick a random winner — great for decisions and giveaways.

Generate random numbers in any range — one or many, unique or repeating, optionally sorted.

Flip a virtual coin — heads or tails — with an animated flip and a running tally.

Roll virtual dice — d4 to d100, one or many at once — with the total. Great for games and D&D.

A fast tally counter — click or press a key to count, with a custom step and saved total.

Clicks-per-second speed test — pick a duration and beat your best CPS.

Test your typing speed in WPM with live accuracy — 15, 30, or 60 seconds.

Measure your reflexes in milliseconds — wait for green, then click as fast as you can.

Press keys to check they register — find stuck, dead, or ghosting keys on any keyboard.

Fill the screen with solid colors to find dead or stuck pixels and backlight bleed.

Check your microphone with a live level meter and waveform — nothing is recorded.

Preview your webcam and check its resolution and frame rate — nothing is recorded.

Strong, random passwords — custom length and characters, made in your browser.

Test how strong a password is — entropy, rating, and what it's missing. Checked in your browser.