Free online tools that run on your device

Generate strong, random passwords with customizable options.

Generate UUID v4 (random) identifiers instantly.

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

Create a browser and app icon kit from a local PNG, JPEG or WebP image.

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

Decode QR code images locally by choosing a file, dropping it, or pasting a screenshot.

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

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

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

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

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

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

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

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

Encode text to Base64 or decode Base64 back to text.

Convert one or more docker run commands into Compose v2 YAML, with warnings for options that do not map.

Convert a single cURL request into JavaScript Fetch, Python requests or PHP cURL code locally.

Generate JSON Schema from sample data and validate JSON locally with a documented Draft 2020-12 keyword subset.

Generate TypeScript interfaces or type aliases from JSON with nested and optional properties inferred locally.

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

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

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

Encode HTML-sensitive text and decode named and numeric HTML character references.

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

Convert Unix timestamps to human-readable dates and back.

Percent-encode or decode URLs and query strings safely.

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

Convert between Celsius, Fahrenheit, and Kelvin instantly.

Encode or decode text with a classic Caesar shift cipher.

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

Convert a date and time between cities and time zones.

Convert Markdown into clean HTML with a live preview.

Clean CSV data, remove blank rows and columns, deduplicate selected fields, and export locally.

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

Convert CSV files and Excel workbooks locally, selecting which worksheet to export.

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

Extract and validate JSON-LD structured data from HTML.

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

Arrange JPEG and PNG images into a PDF with page size, orientation, and margins.

Export selected PDF pages as JPEG or PNG images locally in your browser.

Convert SRT and WebVTT subtitles, shift timing, rescale for frame-rate differences, and export transcripts locally.

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

Beautify or minify SQL queries for easier reading and sharing.

Format XML for readability or remove whitespace for compact output.

Check sitemap XML structure, entry limits, absolute locations, and duplicate URLs locally.

Remove comments and unnecessary whitespace from SVG markup.

Beautify CSS for editing or compact it for deployment.

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

Count text exactly or estimate words from a character limit.

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

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

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

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

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

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

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

Generate GFM tables from pasted, delimited rows with escaped cells and per-column alignment.

Inspect page metadata and preview a search result locally.

Measure typing speed, accuracy, errors and consistency with timed or fixed-text practice.

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

Rasterize and recompress PDF pages locally with selectable resolution and JPEG quality.

A precise online stopwatch with laps and split times.

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

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

Convert HEIC and HEIF photos to JPEG or PNG in your browser.

Combine PDF files and reorder pages locally in your browser.

Extract selected PDF pages into one or more files using page ranges.

Rotate selected PDF pages losslessly or manually deskew scanned pages with a clearly disclosed rasterized output.

Add page numbers to selected PDF pages with custom placement, numbering, and a live preview.

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

Extract dominant image colors, pin exact pixels, inspect contrast, and export CSS or JSON locally.

Check foreground and background colours against WCAG AA and AAA.

Inspect basic image metadata locally without uploading the file.

Build a starter Content Security Policy or review selected weaknesses in a raw CSP, with clear scope limits.

Validate hreflang tags in pasted HTML or XML sitemaps, including self-reference and reciprocal-link checks.

Test crawler access against robots.txt rules and generate a starter policy locally.

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

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

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

Inspect URL parts and decode query parameters at a glance.

Calculate percentages, percentage change, and percentage points.

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

Calculate a tip, split the total evenly, and assign leftover cents so every share adds up exactly.

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

Calculate your Body Mass Index and healthy weight range.

Estimate monthly mortgage payments, total cost, and interest.

Scale ingredient quantities by servings, a multiplier, or the amount you have, with editable parsed quantities.

Project investment growth with recurring monthly contributions, compounding choices, and an inflation estimate.

Estimate concrete volume for slabs, rectangular footings, and round columns with a custom waste allowance.

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

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

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

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

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

Check pasted HTTP response headers for common web security protections.

Build and validate five-field Unix cron schedules with readable summaries.

Inspect controller connections, button presses, analog axes, and supported rumble locally in your browser.

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

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

Build weighted loot tables, see each item’s drop chance, and test sample rolls.

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

Compare exactly-k and at-least-k drop odds, expected drops, and attempt thresholds for a fixed chance per attempt.

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

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

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

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

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

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

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

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

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

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

Convert beats per minute to milliseconds for every note subdivision.

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

Convert frames and seconds at exact integer and fractional rates, with SMPTE frame-pair timecode for 48, 50, 59.94, and 60 fps.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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