Every tool on Monu Tools, grouped by category.
Fast, privacy-friendly utilities for developers: format, encode and generate in seconds.
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, right in your browser.
Convert colors between HEX, RGB and HSL with a live preview.
Convert Unix timestamps to human dates and back: UTC, local, ISO 8601 and relative time. Seconds and milliseconds are auto-detected.
Percent-encode and decode URLs and URL components, UTF-8 safe.
Convert JSON to CSV and CSV back to JSON, both ways. Choose the delimiter, handle quoted fields, and copy the result. Everything runs in your browser.
Convert YAML to JSON and JSON back to YAML, both ways. Validates as it converts and shows clear errors. Everything runs in your browser.
Convert numbers between binary, octal, decimal and hexadecimal. Edit any field and the others update instantly. Large values are exact, with no rounding.
Convert CSV to a Markdown table and Markdown tables back to CSV, both directions.
Decode a JSON Web Token to inspect its header and payload, with human-readable expiry and issue times. Runs entirely in your browser; tokens are never uploaded.
Test a regular expression against your text in real time. See every match highlighted, with capture groups and flags. Runs entirely in your browser.
Build and check cron expressions. Pick a preset or edit the five fields, and see the next run times in your time zone. Runs entirely in your browser.
Format, beautify and validate JSON online with clear error messages for invalid input.
Encode text to Base64 or decode Base64 back to text. UTF-8 safe with automatic direction detection.
Generate 5 random RFC 4122 version 4 UUIDs at once. The input is ignored; run again for a new batch.
Minify and validate JSON in your browser, and see how many bytes you save.
Encode text to HTML entities or decode entities back to text, UTF-8 safe and client-side.
Convert Unix file permissions between checkboxes, octal (like 755) and symbolic notation (like rwxr-xr-x).
See your own IP address and look up the location, ISP and network details of any IP.
Generate SEO and social meta tags (title, description, Open Graph, Twitter Cards) with a live search preview.
Check the contrast ratio between two colours against WCAG AA and AAA accessibility levels.
Format and beautify SQL queries with clause line breaks and consistent keyword casing, or minify them to a single line.
Beautify XML with proper indentation, or minify it to a single line. Comments, CDATA and processing instructions are preserved.
Beautify CSS with clean indentation, or minify it to shrink file size. Handles media queries, calc() and license comments.
Beautify HTML with block-aware indentation, or minify it. The contents of pre, textarea, script and style are preserved.
Beautify and prettify JavaScript with consistent indentation and spacing. Runs entirely in your browser.
Convert CSV to an Excel .xlsx file and Excel back to CSV, entirely in your browser. Works in both directions.
Generate TypeScript interfaces from a JSON sample, with nested types, arrays and optional fields. Runs in your browser.
Convert JSON to XML and XML back to JSON, in both directions, entirely in your browser.
Parse a URL query string into JSON and build a query string from JSON, in your browser.
Create and sign HS256 JSON Web Tokens from a payload and secret, entirely in your browser.
Search and look up HTTP status codes and their meanings, from 1xx to 5xx.
Convert a .env file to JSON and JSON back to .env, in both directions, entirely in your browser.
Generate an HMAC for a message and secret key using SHA-1, SHA-256, SHA-384 or SHA-512, in your browser.
Hash a password with bcrypt and verify a password against a bcrypt hash, entirely in your browser.
Convert a curl command into equivalent JavaScript fetch code, entirely in your browser.
Convert JSON to TOML and TOML back to JSON, in both directions, entirely in your browser.
Convert an image into a Base64 data URI for embedding in HTML, CSS or JSON, entirely in your browser.
Generate a tint and shade scale plus complementary, analogous and triadic colors from a base color.
Turn any image into a complete favicon set, the .ico, PNG sizes, Apple touch icon and a web manifest, generated in your browser.
Analyse and transform text in seconds.
Convert text between UPPERCASE, lowercase, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and dot.case.
Count words, characters, lines and sentences in any text.
Compare two texts and highlight the exact lines and words that changed, instantly and in your browser.
Generate placeholder text by paragraphs, sentences or words, with one click.
Remove duplicate lines from a list or text, with options to ignore case, trim and sort.
Reverse text by character, word or line, or flip it upside down.
Clean up messy whitespace: trim lines, collapse spaces, remove blank lines and line breaks.
Turn any title into a clean, SEO-friendly URL slug, with German umlaut handling.
Convert numbers to Roman numerals and Roman numerals back to numbers (1 to 3999).
Sort lines of text alphabetically, numerically or by length, with options to trim, deduplicate blanks and ignore case.
Translate text to Morse code and Morse code back to text, using the international standard.
Convert Markdown to HTML and HTML back to Markdown, with a live preview. Works in both directions.
Extract the text from a PDF and get it as Markdown, entirely in your browser. Your file is never uploaded.
Convert a Word .docx document to clean Markdown in your browser, preserving headings, lists and formatting.
German online calculators for salary, taxes and VAT.
Calculate your German net salary with the official 2025 & 2026 payroll-tax algorithm: tax class, Bundesland, church tax, children and public or private insurance.
Calculate VAT for Germany (19/7 %), Austria (20/13/10 %) and Switzerland (8.1/2.6/3.8 %), both ways: add VAT to a net amount or remove it from a gross amount.
Estimate German Elterngeld: Basiselterngeld and ElterngeldPlus, with the sibling bonus and multiple-birth bonus, based on your net income before birth.
Estimate your German statutory pension from your salary and contribution years using the official pension formula, including early or later retirement and health and care insurance.
Project how savings or an ETF plan grow with compound interest. Set a starting amount, monthly contribution, return and duration, and watch the balance grow year by year.
Calculate German income tax from your taxable income using the official 2026 tariff, with the splitting tariff for couples, solidarity surcharge and church tax.
Estimate the tax on a German severance payment with the one-fifth rule (§34 EStG), and see how much that rule saves compared with normal taxation.
Estimate German statutory sick pay (Krankengeld): 70 % of your gross, capped at 90 % of net and the contribution ceiling, minus social contributions.
Work out your German statutory vacation entitlement, pro-rated for part-time working days and a partial year, under the Federal Leave Act (BUrlG).
Add up cold rent, operating costs and heating into the warm rent, see the price per square metre, and check the rent-to-income ratio.
Work out your share of a building's operating costs by living area and reconcile it against your advance payments, to see a refund or back payment.
Calculate the monthly payment, total interest and effective APR for an annuity loan or credit. Includes an optional fee and a year-by-year repayment chart.
Convert between an hourly rate and weekly, monthly and yearly pay, in both directions.
Calculate the German commuter allowance (Entfernungspauschale) from your one-way distance and number of working days.
Estimate the annual German motor vehicle tax (Kfz-Steuer) for cars first registered from 2021, from displacement, CO2 and fuel type.
See how the purchasing power of an amount changes between two years, using the official German consumer price index.
Estimate French income tax on 2025 income using the official 2026 barème, with the quotient familial (parts), plafonnement and décote.
Calculate French TVA: enter an amount HT or TTC and get the breakdown at 20 %, 10 %, 5.5 %, or 2.1 %.
Calculate the monthly payment, total interest and credit cost for a French mortgage or loan. Includes assurance emprunteur.
Convert a French monthly gross salary to net in seconds. Based on the official 2026 employee contribution rates: vieillesse, Agirc-Arrco, CSG/CRDS.
Estimate your French base-regime state pension (régime général). Enter your average salary, quarters validated and required, and see the monthly pension with taux plein or decote applied.
Estimate Spanish IRPF income tax for 2026 using the combined estatal and autonomica scale. Enter your base liquidable and see cuota, tipo medio, and tipo marginal.
Calculate Spanish IVA for 2026. Enter the base (excl. IVA) or total (incl. IVA) and see the full breakdown at 21 %, 10 %, or 4 %.
Calculate Spanish statutory severance pay (indemnizacion por despido) for 2026. Enter your monthly salary, years of service, and dismissal type to see the indemnizacion and whether the monthly salary cap applies.
Calculate your Spanish net salary for 2026. Enter your annual gross and pay period count (12 or 14) to see take-home pay after Seguridad Social (6.5 %) and IRPF withholding.
Work out your Dutch net salary for 2026 from your gross. See income tax (Box 1), the algemene heffingskorting and arbeidskorting credits, the 8% vakantiegeld, and an optional 30%-ruling toggle.
Calculate Dutch BTW for 2026. Enter a net amount (excl. BTW) or a gross amount and get the full breakdown at the 21% standard rate or the 9% reduced rate.
Calculate your Dutch vakantiegeld (holiday allowance) for 2026. Enter your gross annual salary and see the 8% allowance, the amount reserved each month, and the net you keep after marginal-rate tax.
Calculate your Dutch transitievergoeding (statutory severance) for 2026. Enter your gross monthly salary and years of service to see the 1/3-month-per-year payment, the statutory maximum, and the amount after the cap.
Work out your UK take-home pay for the 2025/26 tax year. Enter your gross salary, choose England, Wales and NI or Scotland, and add a student loan plan to see income tax, National Insurance, and your net pay per month and per year.
Calculate UK VAT fast. Enter a net amount (excl. VAT) or a gross amount and get the full breakdown at the 20% standard rate, the 5% reduced rate, or the 0% zero rate.
Work out your UK statutory redundancy pay for 2025/26. Enter your age, full years of service, and gross weekly pay to see the weeks of pay you are owed and the total, with the 719 GBP weekly cap applied.
Work out your US federal take-home pay for 2025. Enter your gross salary and filing status to see federal income tax, Social Security and Medicare (FICA), and your net pay per month, per year, and per biweekly paycheck.
Add US sales tax to a price or reverse it out of a total. Enter your combined state plus local rate, or pick a common preset, and see the subtotal, the tax, and the total.
Estimate Italian IRPEF income tax for 2026 using the three-bracket scale and the standard detrazione lavoro dipendente. Enter your taxable income and see IRPEF lorda, detrazione, IRPEF netta, and effective rate.
Calculate your Italian net salary for 2026 from RAL. Includes INPS contributions, IRPEF on the imponibile, and addizionali regionale and comunale.
Calculate Italian IVA for 2026. Enter an imponibile (excl. IVA) or a gross total and get the full breakdown at 22 %, 10 %, 5 %, or 4 %.
Calculate your Italian TFR (Trattamento di Fine Rapporto) with yearly rivalutazione. Enter RAL, years of service, and revaluation rate to see the TFR accumulated, the annual quota, and how much rivalutazione adds versus the flat figure.
Handy little tools for everyday tasks.
A simple tap counter. Count up or down with one tap, great for reps, people, stitches or inventory.
Generate strong, random passwords with full control over length and character types. Everything happens in your browser.
Create a QR code from any text or URL. Choose the error correction, colors and quiet zone, then download it as PNG or SVG. Everything runs in your browser.
A countdown timer and a stopwatch in one. Set hours, minutes and seconds for the timer, or track laps with the stopwatch. Includes an alarm sound.
Calculate your Body Mass Index from weight and height in metric or imperial units. See your WHO category, your healthy weight range and an age-based reference.
Estimate your basal metabolic rate, the calories your body burns at rest, with the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle equations, plus your TDEE for your activity level.
Estimate your body fat percentage with the US Navy tape method or a BMI-based formula, plus your fat mass and lean mass, in metric or imperial units.
Estimate how much water to drink each day from your body weight, exercise and climate, with the amount in liters, cups, ounces and glasses, alongside the EFSA and US health baselines.
Estimate your daily protein needs from your body weight and goal, from general health to building muscle or losing fat. Metric and imperial units.
Work out the days between two dates, or add and subtract days, weeks, months and years from a date. Shows the duration, total days and the weekday.
Estimate your daily calorie needs (BMR and TDEE) from your sex, age, height, weight and activity level, with targets for losing, maintaining or gaining weight.
Work out percentages six ways: a percent of a value, what percent one number is of another, the base behind a percent, percentage change, increase or decrease, and percentage difference.
Convert length, weight, temperature, volume, area, speed and data units instantly.
Convert between 30+ currencies using daily European Central Bank reference rates.
Calculate your exact age in years, months and days, plus totals and your next birthday.
Generate random numbers in any range, with or without duplicates, using secure randomness.
Convert a time across the world's major time zones, with daylight saving handled automatically.
Solve proportional and inverse rule-of-three problems: if A corresponds to B, what does C correspond to?
Work out the tip and split the bill between any number of people, with optional rounding up.
Calculate your weighted grade average from German school grades (1 to 6) with custom weights.
Work out the fuel cost of a trip from distance, consumption and fuel price, and split it between passengers.
Calculate the final price after a percentage discount, or find the discount percentage from the original and sale price.
Estimate your blood alcohol concentration in per mille with the Widmark formula, based on the drink, your weight and the time elapsed.
Work out what an appliance costs to run from its power draw, daily usage and your price per kWh.
Calculate your Italian degree grade (voto di laurea) from exam grades in trentesimi. Enter each exam grade and CFU, add thesis points and bonus, and get the 110-scale grade plus ECTS and approximate US GPA.
Resize, convert and compress images right in your browser.
Resize images to exact dimensions in your browser and export as PNG, JPEG or WebP. Your photos never leave your device.
Convert SVG vector graphics to PNG raster images at any size, entirely in your browser.
Compress JPEG, PNG and WebP images to a smaller file size in your browser, with a quality you control.
Vectorize a raster image (PNG, JPG) into a scalable SVG by tracing it, entirely in your browser.
Crop JPG, PNG and other images by dragging a selection, entirely in your browser.
Add a text watermark to an image, with control over size, color, opacity and position, all in your browser.
Convert Apple HEIC and HEIF photos to JPG, entirely in your browser. No upload, no app needed.
Convert images between JPG, PNG and WebP in your browser, with a quality control for the lossy formats.
Rotate and flip an image in your browser, with a live preview, and download the result.
Create a classic meme with top and bottom text on your own image, entirely in your browser.
Blur or pixelate faces, license plates and private details in a photo by drawing over them, entirely in your browser.
Remove the hidden metadata from your photos, including EXIF, GPS location, camera and date, entirely in your browser.
Erase the background from a photo and download a transparent PNG, with the cutout computed entirely in your browser. Nothing is uploaded.
Merge, split and inspect PDF files right in your browser.
Combine several PDF files into one, in any order, entirely in your browser. Your files are never uploaded.
Extract specific pages or a range from a PDF into a new file, entirely in your browser.
Count the number of pages in a PDF and see its file size, entirely in your browser.
Convert each page of a PDF into a PNG image, entirely in your browser. Download pages individually or all at once.
Combine JPG, PNG and other images into a single PDF, one image per page, entirely in your browser.
Reduce the file size of a PDF in your browser by re-rendering its pages at a quality you choose.
Rotate every page of a PDF by 90, 180 or 270 degrees, entirely in your browser. Lossless and instant.
Reorder and delete pages in a PDF, then save the rearranged file, entirely in your browser.
Add page numbers to a PDF, with a choice of position, start number and format, entirely in your browser.
Black out names, numbers and any private text in a PDF, then download a copy with the redacted content truly removed, not just hidden. Runs in your browser.
Remove the password from a PDF you can open, and download an unlocked copy with all content intact. Runs entirely in your browser.
Add a password to a PDF with strong AES-256 encryption, so only people with the password can open it. Runs entirely in your browser.