Free online tools for every task.

Small Business Rate Relief Calculator 2026/27 (England)

Estimate your 2026/27 business rates bill in England: small business rate relief taper, 2026 multipliers, the 1p supplement, monthly instalments and a Budget scenario.

GTA 6 Storage Calculator – Will It Fit on PS5 / Xbox?

Gaming Tools

Check in seconds whether GTA 6 and other big games fit on your PS5, PS5 Pro, Xbox Series X or Series S, and how many GB to free if they do not.

Aircraft Registration Decoder (Tail Number Country)

Auto & Travel

Find the country and series of an aircraft registration (7T-VCC, F-GKXA, N12345), spell it in the ICAO radio alphabet, decode Mode S hex addresses and look up airline ICAO and IATA codes.

Exam Timetable Generator

Schedule an exam session: days and slots, shared papers, rooms and their seats, invigilators with absences, and per-group, room and invigilator timetables.

Study Planner

Turn exam dates and chapters into a day-by-day revision timetable: workload from difficulty, spaced reviews, rest days, a check list and replanning when you fall behind.

Shift Schedule Maker

Build a staff rota for 1 to 8 weeks: shifts through midnight, staff needed per day, skills, absences, rest between shifts and fair nights and weekends.

Seating Chart Maker

Arrange guests at tables for a wedding or event: couples kept together, guests kept apart, seating wishes, pinned tables, drag-and-drop, place cards.

Cut List Optimizer (1D and 2D)

Optimize cutting of bars, tubes and boards (1D) or sheets and panels (2D): fewest stock pieces, kerf, edge trim, grain and guillotine cuts, with diagrams.

School Timetable Generator

Generate a school timetable automatically from classes, teachers, subjects and rooms: no clashes, availability respected, drag-and-drop editing, PDF and Excel.

FAFSA SAI Calculator 2027-28 (Student Aid Index)

Estimate your 2027–28 Student Aid Index (SAI) and Pell Grant eligibility with the official FSA formulas A, B and C: dependent or independent, with every worksheet line shown and instant results.

iPhone Duo Wallpaper Resizer

Resize any photo to the exact iPhone Duo wallpaper size: 1878 × 2670 pixels for the inner screen and 1398 × 2034 for the outer screen, both in one ZIP, cropped around the point you choose.

Pumpkin Stencil Maker (Photo to Carving Template)

Turn a photo into a pumpkin carving stencil: adjust the threshold, smoothing and minimum bridge width, invert it, then print it at your pumpkin’s size as a PDF on A4 or Letter, or save a PNG.

Monte Carlo Retirement Simulator

Will your money last? Run 1,000 to 10,000 random market scenarios to see your probability of retirement success, P10/P50/P90 savings by age, the median age the money runs out and a CSV export.

French Income Tax Calculator 2026 / 2027

Estimate French income tax (impôt sur le revenu) on 2025 income with the current scale, or on 2026 income with the 2027 finance bill: parts, family quotient cap, décote, net tax, marginal and average rates, bracket by bracket.

Daylight Saving Time Dates (When Do Clocks Change)

Find the exact dates and times the clocks change in any country or time zone, for 2026 or any year: spring forward, fall back, a countdown and calendar reminders.

US Federal Tax Bracket Calculator 2026 / 2027

See which federal tax bracket you are in for 2026 or 2027, your tax bracket by bracket, your marginal and effective rates and how much the 2027 inflation adjustment changes your bill.

ACA Subsidy Calculator 2027 (Premium Tax Credit)

Estimate your 2027 Obamacare premium tax credit from household size, income and the benchmark Silver premium, with a 400 % poverty-line cliff warning and an employer-plan affordability test.

Social Security COLA Calculator 2027

See your 2027 Social Security check after the official 3.6 % COLA: new benefit, monthly and yearly raise, net payment after Medicare Part B, SSI amounts and the COLA history.

HSA Contribution Calculator 2027

Find your 2026 or 2027 HSA contribution limit for self-only or family coverage, with the 55+ catch-up, partial-year proration, the last-month rule, employer money and your tax saving.

Turkey Size & Cooking Time Calculator

Cooking & Kitchen

Work out how big a turkey to buy for your guests, when to start thawing it and when it goes in the oven, from official USDA times, with a calendar file for every step.

JXL to JPG Converter (JPEG XL to JPG)

Convert JPEG XL (.jxl) images to JPG in bulk on your device so they open everywhere, with quality, resize and background options and a size comparison with WebP and AVIF.

JXL to PNG Converter (JPEG XL to PNG)

Convert JPEG XL (.jxl) images to lossless PNG in bulk on your device, keeping transparency, with optional resizing and colour reduction for smaller files.

JPG to JXL Converter (Convert to JPEG XL)

Convert JPG, PNG and other images to JPEG XL in bulk on your device, lossy or lossless, and compare the file size with JPG, WebP and AVIF before you choose.

Photo Editor (Layers, PSD)

Edit photos in your browser with layers, selections, brushes, text, shapes, crop, clone stamp and about 40 effects; open and save PSD files with their layers, or export PNG, JPG, WebP, GIF, BMP or TIFF.

Public Holidays 2027 by Country

List the public and bank holidays of 207 countries and their states for any year, with long weekends, bridge days and a calendar file for Google, Outlook or Apple.

TIFF to JPG Converter

Convert TIFF and TIF images to JPG, PNG, WebP or AVIF in bulk on your device, including 16-bit and compressed scans, with quality and resize options.

PSD to PNG Converter

Open Photoshop PSD files without Photoshop and save the flattened image as PNG, JPG, WebP or AVIF, with transparency kept in PNG, WebP and AVIF.

File, Office & Spreadsheet Converters

RAR Extractor (Open RAR Files)

Open and extract RAR files online without WinRAR: browse the contents, preview text and images, download single files, everything as a ZIP or into a folder.

File, Office & Spreadsheet Converters

7Z Extractor (Open 7-Zip Files)

Open and extract 7Z files online without 7-Zip: browse the contents, preview text and images, download single files, everything as a ZIP or into a folder.

File, Office & Spreadsheet Converters

TAR, TAR.GZ & TGZ Extractor

Open TAR, TAR.GZ, TGZ, TAR.BZ2 and TAR.XZ archives or single GZ files online: browse, preview and extract files, or convert the archive to ZIP.

Font Converter (TTF, OTF, WOFF, WOFF2)

Design & CSS Tools

Convert fonts between TTF, OTF, WOFF and WOFF2 in bulk on your device and get a ready-to-paste @font-face CSS rule for your website.

Font Viewer & Character Map

Design & CSS Tools

Open a TTF, OTF, WOFF or WOFF2 font to preview your own text at any size, see every character it contains and read its names, version and licence.

SQLite Viewer & Editor

Open a SQLite database (.db, .sqlite) in your browser: browse tables and schemas, run SQL queries, edit data and export results to CSV or JSON.

SQL Query on CSV & JSON Files

Run SQL queries on CSV, TSV and JSON files in your browser: each file becomes a table you can filter, group and join, then export the result.

Parquet Viewer & Converter

Open Apache Parquet files in your browser: see the schema, row groups and compression, page through rows, query them with SQL and export to CSV or JSON.

Online Python Compiler

Write and run Python 3 code in your browser with no install or account: output, errors, input() values, examples, .py download and share links.

Code Formatter (Prettier)

Format JavaScript, TypeScript, JSX, JSON, CSS, SCSS, Less, HTML, Vue, Markdown, YAML and GraphQL with Prettier in your browser, with live preview.

English Grammar Checker

Text Tools

Check English grammar, spelling and style in your browser: errors are underlined as you type, with one-click suggestions for American, British and other English.

Online Whiteboard (Excalidraw)

Sketch diagrams, wireframes and ideas on an infinite hand-drawn whiteboard in your browser, then save the board or export it as PNG or SVG.

PostgreSQL Online Playground

Run real PostgreSQL in your browser: create tables, insert data and test queries, window functions, JSONB and CTEs, then save the database to reopen it later.

Typst Online Editor

Write Typst documents in your browser with a live PDF preview: headings, tables, math formulas, code and images, then download the PDF. No sign-up and no upload.

Online Diagram Editor

Draw flowcharts, UML, network, org and ER diagrams by drag and drop with thousands of shapes. Opens and saves .drawio files and exports PNG or SVG, all in your browser.

Secret Santa Generator

Generators & Randomizers

Draw names for a gift exchange with exclusions for couples, send each person a private link that shows only their match, or print fold-over slips.

Printable Calendar 2027

Print a yearly or monthly calendar for 2027 or any year in 11 languages, with weeks starting on Monday, Sunday or Saturday, ISO week numbers and A4 or Letter paper.

Schengen 90/180 Days Calculator

Auto & Travel

Count the days you have spent in the Schengen area in any 180-day window, see how many of your 90 days are left, the longest stay you can start and when the full allowance comes back.

Group Expense Splitter

Split shared costs for a trip, flat or event: enter who paid what and for whom, and get the shortest list of payments to settle up, exact to the cent.

IBAN Validator and BIC Checker

Check one IBAN or a thousand at once: country length and mod-97 check digits, with the printed format, the domestic account part and an optional BIC/SWIFT format check.

FIRE Calculator (Financial Independence)

Find your FIRE number from your yearly spending and withdrawal rate, how many years until you reach it, and your Coast FIRE number, all in today’s money.

Rent vs Buy Calculator

Compare the wealth you build by buying a home or by renting and investing the difference, with mortgage, taxes, upkeep, buying and selling costs and price growth.

Old Currency to Euro Converter

Convert the Bulgarian lev, French franc, German mark, Italian lira, Spanish peseta and the other former euro-area currencies at their fixed official rates, with bulk price lists and dual price labels.

GST Calculator (GST 2.0)

Add or remove GST at 0, 5, 18 or 40 % with the CGST/SGST or IGST split and optional cess, or use any GST rate such as 10 % in Australia or 15 % in New Zealand.

Cash Rounding Calculator

Round a cash total to the nearest 0.05, 0.10, 0.50 or 1, the way tills do without pennies or small coins, and work out the change to give.

Prayer Times

Accurate Islamic prayer times for any city or your current location: Fajr, Sunrise, Dhuhr, Asr, Maghrib and Isha, with 18 calculation methods and a monthly timetable.

Online Guitar Tuner

Audio Tools

Tune a guitar, bass, ukulele, violin, cello, oud and more with your microphone, or tune by ear with reference notes. Chromatic mode for any note.

Online Metronome

Audio Tools

A precise online metronome with tap tempo, time signatures, accents, subdivisions, three sounds and a speed trainer that raises the tempo as you practise.

Virtual Keyboard — Type in Any Language

Text Tools

Online keyboard for Arabic, Persian, Hebrew, Russian, Ukrainian, Greek, Korean, Japanese kana, Hindi, pinyin and accented Latin letters. Type, then copy.

Cups to Grams Converter

Cooking & Kitchen

Convert cups, tablespoons and teaspoons to grams and back for flour, sugar, butter, milk and 30 other ingredients, with US, metric, UK and Japanese cups.

Discord Timestamp Generator

Gaming Tools

Create Discord timestamp codes such as <t:1798745400:F> that show every reader the time in their own time zone, with a preview of all seven formats including relative time.

Moon Phase Calculator

Moon phase, illumination and age for any date, the next new moon, quarters and full moon in your time zone, a monthly moon calendar and every phase of the year.

Mouse Sensitivity Converter

Gaming Tools

Convert your mouse sensitivity between CS2, Valorant, Apex Legends, Overwatch 2, Call of Duty, Marvel Rivals and Source games, with eDPI and cm/360.

Scientific Calculator

Free online scientific calculator with trigonometry in degrees or radians, logarithms, powers, roots, factorials, nCr, memory and a history of results.

Citation Generator (APA, MLA, Chicago, Harvard)

Format references for journal articles, books and web pages in APA 7, MLA 9, Chicago 18 and Harvard at once, with in-text citations and italics kept on paste.

Interactive Periodic Table

Explore all 118 elements: click any element for its atomic mass, group, period, block, category, state and electron configuration, or search by name or symbol.

Tire Size Calculator and Comparison

Auto & Travel

Compare two tyre sizes: diameter, width, sidewall, circumference, revolutions per km and the speedometer error after changing size.

One-Rep Max Calculator (1RM)

Sports & Training

Estimate your one-rep max from any set using seven formulas, and get training loads from 50 to 100 % rounded to your plates.

UTM Builder (Campaign URL Builder)

Marketing & Social Media

Build campaign links with UTM parameters for Google Analytics, keep naming consistent, and get a QR code and HTML link.

A/B Test Significance Calculator

Marketing & Social Media

Check whether an A/B test result is statistically significant, with the p-value, confidence interval, relative lift and a sample ratio mismatch check.

Resistor Color Code Calculator

Decode 3, 4, 5 and 6-band resistor colours into resistance and tolerance, or find the bands for a value, with a drawn resistor and nearest standard values.

Website Server Sizing Calculator

Estimate peak traffic, concurrent visitors, requests per second, bandwidth and the CPU and RAM a server needs from your monthly website visitors.

Firewall Rule Generator

Write firewall rules once and generate iptables, nftables, UFW, firewalld, Windows Defender Firewall, Cisco ACL and MikroTik configurations.

Subnet Calculator (IPv4 & IPv6)

Calculate network, broadcast, host range, mask, wildcard and usable hosts for any IPv4 or IPv6 prefix, and split it into smaller subnets.

RAID Calculator

Calculate usable capacity, efficiency, fault tolerance, IOPS, throughput and rebuild time for RAID 0, 1, 5, 6, 10, 50, 60 and ZFS RAIDZ.

WireGuard Config Generator

Generate WireGuard server and client configurations with keys created in your browser, IPv4/IPv6 addressing, full or split tunnel and QR codes.

Network Bandwidth Calculator

Work out the download and upload bandwidth an office or site needs from its users and applications, with headroom and a recommended link.

Video Storage Calculator

Estimate CCTV and NVR disk space from cameras, resolution, frame rate and codec, or from a camera bitrate.

Background Remover

Remove image backgrounds in your browser: automatic solid-colour removal, box selection, and local AI for people and objects. Refine edges, then download a transparent PNG or add a new background.

Internet Speed Test

Measure your internet speed: ping, jitter, download and upload in Mbps, with an animated speedometer and live graphs.

Redact PDF

PDF Tools

Permanently black out text, numbers and areas in a PDF. Search words or patterns, review the boxes, and verify nothing remains.

PDF to Excel

PDF Tools

Convert PDF tables to an editable Excel workbook. Rows, columns and numbers are rebuilt locally from the PDF text, with a live preview.

QR Code & Barcode Scanner

QR Code & Barcode Tools

Scan QR codes and barcodes with your camera or from images, screenshots and PDFs. Reads 30+ formats locally and explains links, Wi-Fi, contacts and product codes.

Mermaid Live Editor

Write Mermaid code and see flowcharts, sequence, class, state, ER, Gantt and mind map diagrams render live, then export SVG or PNG.

Microphone Test

Check that your microphone works with a live level meter, waveform, clipping warning and a 5-second playback clip.

Webcam Test

Check your webcam online: live preview, delivered resolution, measured frame rate, camera list and PNG snapshot.

Keyboard Test

Test every key of your keyboard online: pressed keys light up on a full-size layout, with key codes and a multi-key rollover count.

Screen Test

Check your display: resolution, pixel ratio, color depth, HDR and refresh rate, plus full-screen gradient, sharpness, black level and motion patterns.

Dead Pixel Test

Find dead and stuck pixels by filling your screen with solid colors in full screen. Manual or automatic color cycle, no flashing.

Color Blindness Simulator

Design & CSS Tools

See how images and color palettes appear with protanopia, deuteranopia, tritanopia or achromatopsia, and find color pairs that become hard to tell apart.

Email Signature Generator

Create a professional email signature from 20 original designs, then copy it into Gmail, Outlook, Apple Mail or Thunderbird.

Typing Speed Test

Text Tools

Measure typing speed in WPM and accuracy with timed, word-count, passage and custom-text tests in 11 languages.

Paint Calculator

Estimate wall and ceiling area, litres of paint and the number of cans from coats, coverage and waste.

Solar Output Calculator

Estimate daily, monthly and yearly energy from panel watts, panel count, peak sun hours and a loss percent.

Flowchart Maker

Make flowcharts online from text or with the add-step form: decisions, loops and process steps, exported as SVG or PNG.

ATS CV Builder

Build an ATS-friendly CV locally with three original layouts, section titles in eleven languages, a job-posting keyword check and a selectable-text PDF.

CR80 ID Card Generator

Create CR80 employee ID cards locally with twenty original landscape and portrait layouts, photo, logo, barcode or QR code, and PDF export for card printers or A4/Letter sheets.