Free online tools that run on your device

✦Generators

Password Generator

Generate strong, random passwords with customizable options.

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UUID Generator

Generate UUID v4 (random) identifiers instantly.

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QR Code Generator

Create QR codes for URLs, text, WiFi, contacts, and more.

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Random Number Generator

Generate random numbers in any range — with count, uniqueness, and sort options.

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QR Code Decoder

Read QR code images locally and inspect their encoded text or links.

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Wi-Fi QR Code Generator

Create a scannable Wi-Fi join code without exposing your credentials.

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Spin the Wheel

Pick a random choice from a list with a shareable spinning wheel.

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Dice Roller

Roll d4, d6, d8, d10, d12, d20, d100 with modifiers and multiple dice.

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Fantasy Name Generator

Generate fantasy names — elf, dwarf, orc, dark, and epic styles.

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Random Number Generator

Generate random numbers in any range — with count, uniqueness, and sort options.

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Equipment & Affix Generator

Generate prototype item names, rarities, and affix combinations for loot systems.

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Quest & Reward Generator

Draft quest objectives and level-scaled rewards for game prototypes.

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✦Converters

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-512 hashes of text or files.

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Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to text.

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Encoding Inspector

Inspect text for likely Base64, hex, URL, HTML, Unicode, JWT, and binary formats.

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Hex / Base16 Encoder & Decoder

Convert UTF-8 text to hexadecimal bytes and decode hex back to text.

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Unicode Escape Encoder & Decoder

Convert Unicode text to JavaScript-style escapes and decode escaped text.

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HTML Entity Encoder & Decoder

Encode HTML-sensitive characters and decode common HTML entities.

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Color Picker & Converter

Pick colors, convert between HEX, RGB, HSL, HSV, CMYK formats.

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Timestamp Converter

Convert Unix timestamps to human-readable dates and back.

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URL Encoder/Decoder

Percent-encode or decode URLs and query strings safely.

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Number Base Converter

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

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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly.

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Caesar Cipher Encoder & Decoder

Encode or decode text with a classic Caesar shift cipher.

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Morse Code Translator

Translate text to Morse code and decode Morse back to text.

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Time Zone Converter

Convert a date and time between cities and time zones.

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Markdown to HTML Converter

Convert Markdown into clean HTML with a live preview.

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CSV to JSON Converter

Convert CSV spreadsheets to JSON or JSON arrays back to CSV.

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HTML Formatter & Minifier

Beautify HTML for reading or minify it for smaller page output.

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JSON-LD Inspector

Extract and validate JSON-LD structured data from HTML.

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Unit Converter

Convert length, weight, volume, area, data, and temperature units.

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YAML ↔ JSON Converter

Convert YAML to JSON and JSON back to YAML privately in your browser.

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SQL Formatter

Beautify or minify SQL queries for easier reading and sharing.

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XML Formatter & Minifier

Format XML for readability or remove whitespace for compact output.

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SVG Optimizer

Remove comments and unnecessary whitespace from SVG markup.

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CSS Formatter & Minifier

Beautify CSS for editing or compact it for deployment.

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✦Text

JSON Formatter & Minifier

Format, validate, minify, and pretty-print JSON.

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Word & Character Counter

Count text exactly or estimate words from a character limit.

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Text Case Converter

Convert text between upper, lower, title, sentence, camel, snake & kebab case.

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Lorem Ipsum Generator

Generate lorem ipsum placeholder text — by words, sentences, or paragraphs.

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Alphabetizer

Sort text lines or words alphabetically — with reverse, case, and dedupe options.

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Word Scramble Solver

Unscramble letters into words — with a built-in dictionary and scrambler.

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Wordle Solver

Filter possible Wordle answers using green, yellow, and grey feedback.

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Regex Tester

Test and debug regular expressions against your text — with live matches.

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Text to Markdown Converter

Convert plain text into clean Markdown — headings, lists, and links detected automatically.

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SEO Meta & SERP Preview

Inspect page metadata and preview a search result locally.

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Text Diff & Compare

Compare two texts, code files, or configuration snippets side by side.

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✦Network

DNS Lookup

Check A, AAAA, CNAME, MX, TXT, NS, and SOA records via DNS-over-HTTPS.

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What Is My IP

See your public IP address, location, ISP, and connection details.

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IPv4 Subnet Calculator

Calculate CIDR networks, masks, address ranges, and usable hosts.

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URL Parser & Query Builder

Inspect URL parts and decode query parameters at a glance.

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✦Calculators

Percentage Calculator

Calculate percentages, percentage change, and percentage points.

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Age Calculator

Calculate exact age in years, months, days, and total days lived.

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Tip Calculator

Split bills and calculate tips per person in seconds.

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Date Difference Calculator

Calculate days, weeks, and years between two dates — plus date arithmetic.

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BMI Calculator

Calculate your Body Mass Index and healthy weight range.

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Mortgage Calculator

Estimate monthly mortgage payments, total cost, and interest.

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Unix Permissions Calculator

Convert chmod octal values into readable owner, group, and public permissions.

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Percentage Calculator

Calculate percentages: X% of Y, X is what % of Y, and percentage change.

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✦Security

Password Strength Tester

Test any password against real-world rules — length, entropy, and crack time.

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File Hash Checker

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

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JWT Decoder & Builder

Decode JWT headers and payloads or build an unsigned token for testing.

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HTTP Security Headers Analyzer

Check pasted HTTP response headers for common web security protections.

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✦Tools

Stopwatch

A precise online stopwatch with laps and split times.

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Countdown Timer

A full-screen countdown timer with presets and sound alert.

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Image Resizer & Compressor

Resize and recompress images locally as JPEG, PNG, or WebP.

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Image Cropper

Select and crop an image locally with a draggable selection area.

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Color Contrast Checker

Check foreground and background colours against WCAG AA and AAA.

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Image Metadata Viewer

Inspect basic image metadata locally without uploading the file.

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✦Developer

Cron Expression Generator

Build cron schedules and understand them in plain English.

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✦Game

Level & Cost Curve Calculator

Design XP and upgrade cost curves — linear, exponential, power — with JSON/PHP/CSV export.

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Dice Probability Calculator

Calculate the exact odds of rolling any sum on NdY dice.

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Loot Table Generator

Build weighted loot tables and roll from them — with rarity weights.

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Economy Balancer

Track currency faucets and sinks, spot inflation, and balance your game economy.

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Drop Rate Calculator

Real odds behind drop rates: ≥1 drop in N attempts, expected drops, median attempts.

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Advantage Calculator

Success odds for advantage and disadvantage rolls on any die against any target number.

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RNG Fairness Tester

Chi-square bucket test on crypto or Math.random sources — is your RNG fair?

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Enemy Scaling Calculator

Preview enemy HP and damage curves — linear, multiplicative, exponential.

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Dialogue Branching Planner

Estimate endings and conversation nodes before a branching dialogue tree explodes in scope.

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Behaviour Tree Planner

Sketch AI selectors, sequences, actions, and conditions, then export the node list as JSON.

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Localization Readiness Checker

Check placeholders, missing tokens, and translation expansion before text reaches the build.

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✦Combat

Damage Formula Calculator

Tune base damage, attack scaling, armor, mitigation, and crits — see normal, crit, and expected hits live.

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TTK & DPS Calculator

Compare weapons by time-to-kill, DPS, shots to kill, and sustained DPS with reloads.

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Projectile Motion Calculator

Range, max height, and time of flight for arcing projectiles — with trajectory preview.

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Encounter Difficulty Calculator

Estimate encounter threat from party size, levels, enemy count, and enemy level.

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✦Audio

BPM to ms Converter

Convert beats per minute to milliseconds for every note subdivision.

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Note Frequency Calculator

Convert MIDI notes to frequency (Hz) and back, with cents offset.

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✦Art

Frames ↔ Time Converter

Convert frames and seconds at a chosen whole-number frame rate, with non-drop timecode.

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Aspect Ratio Calculator

Convert between width, height, and aspect ratio — with common presets.

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Palette Generator

Generate harmonious color palettes — mono, analogous, complementary, triadic.

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Sprite Sheet Splitter

Slice a sprite sheet into individual PNG frames — columns × rows, fully in-browser.

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Easing Visualizer

Plot and compare easing curves — linear, quad, cubic, back, elastic, bounce.

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Colorblind Checker

Simulate protanopia, deuteranopia, and tritanopia on your palette — flag confusable pairs.

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Animation Budget Calculator

Estimate bone evaluations, pose work, and animation pressure across characters and update rates.

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✦Engine

Layer Mask Calculator

Convert Unity layer selections to integer, hex, binary, and ready-to-paste C#.

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Tick Rate Calculator

Convert server tick rate to ms per tick, ticks per frame, and CPU budget.

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Map Traversal Calculator

How long does it take to cross your map on foot or mounted?

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Hex Grid Calculator

Convert between cube, axial, and offset hex coordinates — with distance math.

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Jump Physics Calculator

Convert jump velocity ↔ apex height under any gravity, with variable fall gravity.

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Isometric Converter

Convert isometric tile coordinates to screen pixels and back using the standard 2:1 diamond projection.

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Texture Memory Calculator

VRAM usage from dimensions, format, and count — with mipmap totals.

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Server Bandwidth Calculator

Egress in Mbps, per-player rates, and daily GB from tick rate and snapshot sizes.

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FOV & Camera Calculator

Viewport size and horizontal FOV from vertical FOV, aspect, and distance.

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Angle Converter

Convert between degrees, radians, gradians, and turns — with nearest direction.

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Direction Vector Calculator

Convert angle ↔ 2D direction vector — Unity/Godot and math conventions.

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Grid Distance Calculator

Tile distance for square, hex, and isometric grids — Manhattan, Chebyshev, and more.

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Dialogue Timing Calculator

How long does a line of text take to display? Reading speed + sentence pauses.

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Tilemap & World Size Calculator

Convert tile dimensions into pixel canvas size, tile counts, and a simple index-memory estimate.

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Pathfinding & Navigation Calculator

Estimate grid search workload, walkable cells, and memory for navigation prototypes.

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Procedural Terrain Generator

Explore seeded noise, scale, and octave settings with a live terrain heightmap preview.

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Multiplayer Network Feel Calculator

See how latency, tick rate, render rate, and interpolation affect perceived motion.

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Save Data & Schema Planner

Draft versioned save fields, types, required values, and migration notes as JSON.

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LOD & Visibility Budget Calculator

Estimate visible entities, triangle load, and LOD mix for mobile and desktop scenes.

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