Tools and converters you need, in one place!

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly and locally.

Convert weight units like kilograms (kg), pounds (lbs), grams (g), and ounces (oz) instantly and locally.

Convert lengths and distances between meters, kilometers, miles, feet, and inches instantly and locally.

Convert between currencies like NOK, EUR, USD, SEK, DKK, and GBP using up-to-date rates from the European Central Bank.

Convert angles between degrees (°), radians (rad), gradians (gon), and turns instantly and locally.

Convert area units like square meters, square feet, acres, and hectares instantly and locally.

Convert data units, file sizes, and network speeds (Mbps, MB/s) locally in the browser.

Convert energy units like joules (J), kilowatt-hours (kWh), and calories (cal) instantly and locally.

Convert frequency units like hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz), and RPM locally.

Convert inches to millimetres and look up common lumber dimensions (like 2x4 and Norwegian timber sizes).

Convert between light units lumen (lm), lux (lx), and candela (cd) using distance and beam angle locally.

Convert typical Norwegian units: mil (10 km), mål/dekar (1000 m²) and pund (500 g) to metric units, both ways.

Convert pressure units like bar, psi, pascals (Pa), and atmospheres (atm) instantly and locally.

Convert Arabic numbers to Roman numerals and back, from 1 to 3999.

Indicative conversion between European, British and American adult shoe sizes.

Convert speed units like km/h, m/s, mph, knots, and Mach instantly and locally.

Convert time units like milliseconds, seconds, minutes, hours, days, weeks, and years instantly and locally.

Convert a time between time zones and see what time it is in cities around the world at once.

Convert volume units like liters, deciliters, milliliters, gallons, and fluid ounces instantly and locally.

Write Markdown files with a live preview, format headers, links, tables, and download as .md or .html.

A private notepad encrypted with your password and stored only locally in your browser. No server, no sharing.

Paste a long web address and get a short link to share. Shortened via the external da.gd service.

Test and debug regular expressions (regex) live with syntax highlighting and match groups.

Encode text to Base64 or decode Base64 back to plain text with UTF-8 and URL-safe options.

Test whether a URL allows cross-origin requests and see which methods and headers are permitted.

Explain cron expressions in plain language and preview the next runs.

Convert tabular spreadsheet data between CSV and JSON formats locally in the browser.

Look up DNS records (A, AAAA, MX, TXT, CNAME, NS) for a domain via Cloudflare DNS-over-HTTPS.

Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 from text.

Encode and decode HTML entities for special characters like &, <, > and non-ASCII characters. All local.

Minify HTML, CSS, and JavaScript by removing comments and excess whitespace locally in your browser.

Send HTTP requests (GET, POST, PUT, DELETE, PATCH) with custom headers and body, and inspect the response.

See your own IP address, or look up country, city, ISP, and coordinates for any IP address.

Format, validate, prettify, and minify JSON data in a tree viewer locally and securely.

Decode JSON Web Tokens (JWT) locally to inspect claims, headers, and expiry timestamps.

Generate placeholder text in paragraphs, sentences or words.

Convert numbers between binary (2), octal (8), decimal (10) and hexadecimal (16), with big-number support.

Create strong passwords and passphrases with adjustable length and charset.

Create QR codes for text, links, email and more. Download as PNG or SVG.

Generate random integers or decimals within a custom range locally in your browser.

Format and beautify SQL queries with indentation and uppercased keywords, for several dialects. All local.

Convert text to UPPERCASE/lowercase, title case, camelCase, snake_case, kebab-case and URL slug.

Compare two texts or files side-by-side to highlight additions, deletions, and differences.

Generate the six-digit TOTP one-time code (2FA) from a Base32 key, locally with HMAC-SHA1.

Convert between Unix time and readable dates, local and UTC.

Encode or decode query parameters and special characters in URLs using percent encoding.

Parse a URL into components, and add, edit or delete query parameters live in a clean interface.

Analyze User-Agent strings to detect browser, OS, device type, and rendering engine offline and locally.

Generate UUID v4 (and NIL/max), one or many at a time.

Count words, characters, sentences, paragraphs and lines in text, with reading time. All local.

Convert structured XML tags to JSON format or parse JSON to XML locally.

Convert configuration files between YAML and JSON format locally and instantly.

Convert WAV audio files to MP3 format locally in your browser with adjustable bitrate and channel settings.

Trim WAV and MP3 files in your browser: see the waveform, pick start and end, preview, and download the clip.

Convert PNG or JPEG images to standard multi-size Windows .ico files locally in the browser.

Convert files and images to Base64 strings (Data URLs) or decode Base64 back to files.

Pick a color from the map and get HEX, RGB and HSL, with a WCAG contrast check.

Convert image formats (including SVG to PNG/JPEG), resize dimensions, and compress files locally.

Extract text from images with OCR. Supports Norwegian and English, and recognition runs locally in your browser.

Pick a base color and get a harmonious palette for websites.

Split a PDF into single pages or merge several PDFs into one. Everything runs locally in your browser.

Compress and convert video (MP4, WebM, MOV, MKV) locally in your browser, lower the resolution and bitrate for a smaller file. Audio is kept.

Make an animated GIF from a slice of a video, pick start and end with a slider, plus width and FPS. Everything runs locally in your browser.

Calculate exact age on a chosen date, or the number of days, weeks, and months between two dates.

Estimate blood alcohol from sex, weight, number of units and time, using the Widmark formula. Indicative only.

Calculate BMI (body mass index), basal metabolic rate (BMR), and daily calorie needs from height, weight, age, and activity.

Calculate the due date and current gestational week from the first day of the last period (Naegele rule).

Calculate monthly payment, total interest, and repayment for an annuity loan from amount, rate, and term.

Simple percentage calculator: percent of a number, sale price after a discount, share as a percent, and percent change.

Calculate how your savings grow with compound interest from initial amount, monthly contribution, rate and time.

Calculate the U-value (thermal transmittance) of a building element by entering layers with thickness and thermal conductivity (lambda).

Calculate voltage drop in a cable from length, current, cross-section and conductor (copper or aluminium), for single- and three-phase.

Find the ISO week number for any date, get calendar dates for a week, or check the current week.

Validate and generate 11-digit Norwegian bank account numbers (MOD11) locally.

Estimate import duty, VAT (moms), and custom clearance fees for shipping goods to Norway.

Work out the Norwegian daycare fee with sibling discounts (30% for child 2, 50% for child 3+) and the 6% income cap.

Estimate your monthly electricity cost from consumption, spot price, markup, and grid rent, with optional Norwegian power subsidy.

Calculate Norwegian holiday pay from last year's qualifying salary at 10.2% or 12%, with the extra for employees over 60.

Estimate maximum mortgage under the Norwegian lending rules: 5x income and 85% loan-to-value. Also shows max purchase price.

Generate and validate Norwegian KID payment numbers using MOD10 or MOD11 check digit algorithms locally.

Get a rough estimate of net salary after Norwegian tax from your gross salary, clearly marked as simplified.

Generate and validate valid Norwegian national identity numbers (fødselsnummer, D-numbers) locally for testing.

Write numbers in Norwegian words, and amounts as kroner and øre for invoices, cheques and contracts.

Validate and generate valid 9-digit Norwegian organization numbers (orgnr) with MOD11 locally.

Plan and divide parental leave weeks and maternity benefits in Norway locally.

Search zip codes and place names across Norway locally.

Calculate Norwegian document duty (2.5% of the price) plus registration fees when buying property.

Get a complete overview of official public holidays and red days in Norway for any given year.

Look up Norwegian tax withholding by your tax card table number and pay period, using the official 2026 routine.

Quickly calculate Norwegian VAT (MVA): add or remove 25%, 15% or 12% and see the amount with and without VAT.

Estimate the Norwegian one-off registration tax from kerb weight and CO2 emissions, using 2026 rates. Electric cars pay only the weight component.

Generate MOD11-valid Danish CPR numbers and validate structure, date and MOD11 locally for testing.

Validate and generate valid Danish CVR company numbers (8 digits, MOD11) locally for testing.

Calculate Danish VAT (moms): add or remove the 25% rate and see the amount with and without VAT.

Validate and generate valid Swedish organization numbers (10 digits, Luhn) locally for testing.

Generate and validate valid Swedish personal numbers (personnummer) and coordination numbers (Luhn) locally for testing.

Calculate Swedish VAT (moms): add or remove 25%, 12% or 6% and see the amount with and without VAT.