Calculate salt, water, and brining times for wet brine, dry brine, and equilibrium brine. Supports 6 salt types, 14 proteins, and curing salt safety checks.

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Calorie Calculator

Calculate your daily calorie needs (TDEE) based on age, gender, weight, height, and activity level.

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Can You Hear This?

Discover how high you can hear with this interactive frequency challenge.

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Case Converter

Convert text between UPPERCASE, lowercase, Title Case, and more.

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Chord Chart

View chord diagrams for guitar and piano with audio playback.

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Code Minifier

Minify JavaScript, CSS, and HTML to reduce file size.

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Coffee Ratio Calculator

Calculate water-to-coffee ratio by brewing method with SCA Gold Cup references, grind size, bloom water, and brew temperature.

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Coin Flip

Flip a virtual coin with 3D animation, cryptographic randomness, multi-coin mode, and session statistics.

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Color Converter

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly.

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Color Palette Extractor

Extract dominant colors from any image. Get hex codes, RGB values, and create palettes.

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Color Palette Generator

Generate beautiful color palettes with harmonies, Material Design tones, and export options.

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Compress PDF

Reduce PDF file size with adjustable quality settings — all compression runs in your browser.

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Cooking Time Calculator

Calculate cooking time for meat and poultry by weight, cut, and doneness with USDA-verified temperatures.

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Cooking Unit Converter

Convert cups, tablespoons, teaspoons, ml, oz, and more.

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Crowd Food Calculator

Calculate food quantities per guest count for any event. Supports sit-down dinners, buffets, BBQs, and appetizer parties with 13 event presets and adjustments for kids, appetite, and duration.

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CSV to JSON

Paste or upload CSV and instantly convert to JSON with nested object support.

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Data Unit Converter

Convert between bytes, KB, MB, GB, TB, and PB with binary or decimal base.

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Decimal Feet Converter

Convert between feet-and-inches (with fractions) and decimal feet. Bidirectional with quick reference table.

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DTMF Tone Generator

Free DTMF tone generator with frequency reference table. Play all 16 touch-tone signals (697–1633 Hz), dial sequences, export WAV files, and generate telecom tones.

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Event Countdown

Count down days, hours, and minutes to your special events.

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Favicon Generator

Generate all favicon sizes from a single image. Complete favicon package for websites.

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Feet and Inches Calculator

Add, subtract, multiply, or divide feet and inches. Calculate rectangular area and perimeter or evaluate measurement expressions.

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Food Cost Calculator

Calculate recipe food cost per serving with AP-to-EP yield factors, waste presets, pricing markup, and contribution margin for 10 business types.

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Gestational Age Calculator

Calculate gestational age, estimated due date, and pregnancy milestones from your last menstrual period.

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GPA Calculator

Calculate your GPA from course grades and credits.

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Grade Calculator

Calculate grades, weighted averages, final exam scores, and grade curves instantly.

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Grams to Cups Converter

Free grams to cups converter — convert grams to cups, tablespoons, and teaspoons for 50+ baking ingredients using King Arthur and USDA density data.

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Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.

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HEIC Converter

Convert iPhone HEIC/HEIF images to JPG or PNG format instantly.

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Image Compressor

Reduce image file size while maintaining visual quality.

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Image Converter

Convert images between PNG, JPG, WebP, GIF, and BMP formats instantly.

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Image Cropper

Crop images with preset aspect ratios or custom selections.

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Image Info

Quickly view image dimensions, file size, format, aspect ratio, and color information.

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Image Metadata Viewer

View EXIF data, GPS location, and camera settings from your photos. Strip metadata for privacy.

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Image Resizer

Resize images to exact dimensions or percentages with quality control.

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Image Watermark

Batch watermark photos with text, logos, tiling, 18 fonts, and ZIP download

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Images to PDF

Combine JPG, PNG, or WebP images into a single PDF — privately in your browser.

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Ingredient Substitution Finder

Find ingredient substitutes with dietary filters and quantity calculations for baking and cooking.

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InnoviCat Lorem

Generate placeholder text with 26 generators, 7 output types, and vocabulary statistics.

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Instrument Tuner

Tune your guitar (6/7/12-string), bass (4/5/6-string), ukulele, violin, mandolin, or banjo with 37 tunings and auto-detected strings.

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Interval Timer

Customizable interval training timer for HIIT and workouts.

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JSON Formatter & Validator

Format, validate, and minify JSON with syntax highlighting.

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JSON to CSV

Paste or upload JSON and instantly convert to CSV with automatic column flattening.

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Macro Calculator

Calculate your daily protein, carbs, and fat intake based on your calorie goals and preferred diet type.

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Mains Hum & Ground Loop Tester

Identify electrical hum and ground-loop noise: play a reference 50 or 60 Hz mains hum or buzz and match it by ear against the sound in your system.

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Meat Temperature Guide

Interactive meat temperature chart with USDA safe temps, chef-preferred doneness, and pull temperature calculator.

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Meeting Timer

Run your agenda item by item and see where the meeting time actually went.

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Merge PDF

Combine multiple PDF files into a single document.

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Metronome

Free online metronome with subdivisions, speed trainer, tap tempo, and 6 time signatures.

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Noise Machine

Free noise generator — mix white, pink, brown, blue, and violet noise for sleep, focus, or relaxation with per-channel volume and timer.

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Note Frequency Calculator

Convert between musical notes and frequencies in hertz, with MIDI numbers, wavelengths, an adjustable concert pitch, and a full C0-B8 chart.

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Number Sequences

Find the next number in the sequence by identifying the pattern

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Online Tone Generator

Free online tone generator and sine wave generator. Play pure tones from 20 Hz to 20 kHz at 0.01 Hz precision, with five waveforms, noise types, sweep and WAV export.

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Oven Temperature Converter

Convert between Fahrenheit, Celsius, and Gas Mark.

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Pan Size Converter

Convert recipes between different pan sizes and shapes by matching baking area and capacity.

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Party Drinks & Ice Calculator

Work out how much beer, wine, spirits, soft drinks, and ice to buy for a party, with a shopping list and an optional budget.

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Password Generator

Generate strong, random passwords with customizable options.

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Pattern Recognition

Solve visual matrix, sequence, analogy, and odd-one-out puzzles

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PDF Editor

Edit, merge, split, rotate, and organize PDF pages online.

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PDF to Images

Convert PDF pages to high-resolution PNG or JPEG images — all processing in your browser.

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PDF to Text

Extract text from PDF files to TXT, JSON, or DOCX.

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Percentage Calculator

Calculate percentages, percentage change, and more.

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Pet Age Calculator

Convert your pet's age to human years using veterinary science — dogs (by size), cats, rabbits, ferrets, guinea pigs and hamsters.

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Pizza Dough Calculator

Calculate flour, water, salt, and yeast by pizza count, ball weight, and hydration. Supports 8 styles, 4 yeast types, and 4 fermentation schedules.

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Placeholder Image Generator

Create custom placeholder images with specific dimensions and colors for mockups.

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Pomodoro Timer

Focus timer with 25-minute work sessions and break intervals.

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QR Code Generator

Generate QR codes for URLs, text, WiFi, contacts, and more. Download as PNG or SVG.

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Random Number Generator

Generate random numbers, integers, or sequences within a custom range with no duplicates option.

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Recipe Scaler

Scale any recipe instantly — paste ingredients, set servings, get adjusted quantities with clean fractions. Free, private, works offline.

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Regex Tester

Test regular expressions with live highlighting and match details.

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Rotate PDF

Rotate individual or all PDF pages by 90° or 180° — no upload required.

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Sign PDF

Draw, type, or upload signatures onto PDF documents — your files never leave the browser.

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Slug Generator

Convert text to URL-friendly slugs for SEO-optimized links and file names.

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Sourdough Hydration Calculator

Calculate sourdough hydration, baker's percentages, and ingredient weights with starter decomposition.

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Speaker Test

Test your speakers or headphones right in your browser: check left and right channels, stereo balance, bass, full-range sweeps, and speaker polarity.

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Split PDF

Extract specific pages or split a PDF into multiple files — privately in your browser.

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Stopwatch

Measure elapsed time with lap functionality and millisecond accuracy.

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Text Diff & Compare

Compare two texts side by side and highlight additions, deletions, and changes instantly.

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Time Calculator

Add, subtract, multiply, and divide hours, minutes, and seconds easily.

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Time Zone Converter

Find the time difference between any two cities. Convert times across 600+ cities using the IANA time zone database with DST handling, UTC offsets, and a meeting planner.

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