Kilometers to Miles Converter - Convert Km to Miles Online
Convert kilometers to miles instantly with our free online converter.
Unit Converters
All Tools
114+ free browser-based utilities, organized by category (showing the latest 8 tools per category).
Unit Converters
(6)Kilograms to Pounds Converter
Convert kilograms to pounds (and back) instantly. A free, private online kg to pound converter that runs 100% in your browser.
Unit Converters
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Aspect Ratio & Screen Resolution Converter
Calculate pixel dimensions for any aspect ratio. Includes presets for social media, YouTube, and AI image generators like Midjourney.
Unit Converters
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Digital Storage & Transfer Time Converter
Convert between storage units (GB, TB, GiB, TiB) and calculate file transfer times based on your internet speed.
Unit Converters
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Recipe Scaler & Ingredient Converter
Convert recipe units between volume and weight for specific ingredients. Scale your recipes up or down with a single click.
Unit Converters
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit (and back) instantly. Free online temperature converter.
Unit Converters
Calculators
(21) Popular
Sun Exposure Seat Finder
Find the best side to sit on a bus to avoid direct sunlight or find the sun side based on your travel route.
Calculators
Solar Panel Angle Calculator
Calculate the optimal tilt angle and orientation (azimuth) for solar panels based on your latitude. Includes seasonal adjustments for summer, winter, and year-round performance.
Calculators
Solar Panel Roof Estimator
Estimate how many solar panels can fit on your roof based on roof dimensions, slope pitch, panel layout orientation, and safety setbacks. Calculate system size in kW.
Calculators
Personal Carbon Calculator
Calculate your annual carbon footprint and model reduction scenarios (switching to EV, going vegetarian, installing solar) to see your potential CO2 offsets.
Calculators
Freelancer & Gig Economy Tax Estimator
Estimate your self-employment taxes, income taxes, and recommended quarterly payments. Supports US states, UK, Germany (DE), France (FR), and Canada (CA) client-side.
Calculators
Golf Simulator Space Calculator
Calculate the ideal room dimensions, screen size, aspect ratio, safety clearance, and projector placement for your home golf simulator.
Calculators
Height Comparison Calculator
Visually compare the heights of up to 20 people, characters, or objects side-by-side with a dynamic scale chart. Calculate height differences instantly.
Calculators
Hours Calculator
Add up work hours, calculate time sheet duration between two times, deduct unpaid breaks, and estimate gross earnings instantly.
Calculators
Image Tools
(9)Image Compressor - Reduce Image File Size Online
Compress images (JPEG, PNG, WebP) in bulk, directly in your browser. Reduce PNG palette colors and optimize JPEGs with a live side-by-side comparison slider.
Image Tools
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AI Image Prompt Metadata Viewer
View and extract prompts, seeds, models, and generation parameters embedded in PNG images generated by Midjourney, Stable Diffusion, ComfyUI, and more.
Image Tools
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Free Favicon Maker & Generator - Create ICO & PNGs
Instantly convert any PNG, JPG, or SVG into a complete favicon package. Generates 16x16, 32x32, 180x180 (Apple), and Android app icons with copy-paste HTML code. 100% free and client-side.
Image Tools
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Batch Image Renamer - SEO Friendly Bulk Renaming Tool
Easily rename dozens or hundreds of image files at once. Add custom prefixes, suffixes, numbering, and apply SEO-friendly formatting (slugify) instantly in your browser. 100% free, no uploads, and completely private.
Image Tools
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Bulk Image Resizer - Resize Multiple Images at Once
Resize dozens of images at once. Set exact dimensions or scale by percentage, choose output format, and download individually or as a ZIP. 100% browser-based, no upload.
Image Tools
New Popular
Image Metadata Viewer & Remover
View and remove EXIF metadata from images online. See GPS location, camera model, date taken, and more - then strip it all for privacy.
Image Tools
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Image Resizer
Resize images online - set exact dimensions or scale by percentage. Free, fast, and private.
Image Tools
JPG to PNG Converter
Convert JPG images to PNG format online - free, instant, and 100% private.
Image Tools
Text Tools
(7) New
Text to Morse Code Converter - Free Online Translator
Convert text to Morse code and Morse code back to text instantly. Includes audio playback, adjustable speed, and a full Morse code reference chart. Free, browser-based.
Text Tools
Lorem Ipsum Generator
Generate customized Lorem Ipsum placeholder text instantly. Choose paragraph count, sentence length, or word lists. A private online dummy text utility.
Text Tools
Typing Rhythm Challenge - Reaction Speed & Accuracy Test
Test your typing rhythm, reaction speed, and accuracy. Hit keys as they light up, get your typing style profile, and challenge friends to beat your score.
Text Tools
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Readability Score Analyzer
Analyze your text readability with Flesch-Kincaid and Gunning Fog scores instantly.
Text Tools
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Zalgo Text Generator - Glitch & Corrupted Text Effect
Transform normal text into creepy glitch-style Zalgo text with Unicode combining characters. Adjustable intensity. Copy and paste anywhere - social media, bios, Discord.
Text Tools
Case Converter
Convert text to uppercase, lowercase, title case, camelCase, snake_case, and more. Free online text case tool.
Text Tools
Word Counter
Count words, characters, sentences, and paragraphs. Free online word counter with reading time.
Text Tools
Social Media Tools
(10) Popular
Online QR Code Reader - Scan and Extract Data Free
Instantly scan and read QR codes from images or your camera. Verify link safety and extract raw data without any app installation.
Social Media Tools
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Random Winner Picker
Easily pick random winners for your giveaways, raffles, and contests. Supports multiple winners and substitutes.
Social Media Tools
New Popular
Smart QR Code Generator - Create Custom QR Codes Free
Create professional, styled QR codes with custom gradients, logos, and shapes. Includes a built-in scan test to ensure maximum readability.
Social Media Tools
Social Media Image Resizer
Resize and crop images instantly for Instagram, YouTube, X/Twitter, TikTok, LinkedIn, and Facebook. Custom sizes, live visual cropping, and bulk ZIP exports.
Social Media Tools
Video File Size Calculator
Calculate the estimated file size of your video based on resolution, bitrate, framerate (FPS), duration, and codec standards.
Social Media Tools
YouTube Thumbnail Safe Area Checker
Upload your YouTube thumbnail to check text safe zones, mobile crops, TV previews, and the bottom-right video duration badge in real-time.
Social Media Tools
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Invisible Character Generator — Zero-Width & Blank Unicode
Generate invisible Unicode characters for Twitter, Instagram, TikTok, and Discord. Empty username, blank bio lines, invisible name — copy with one click.
Social Media Tools
Popular
Twitter Thread Maker
Write long-form content and split it into a perfect Twitter/X thread. Numbering options, per-tweet copy, and accurate character counting.
Social Media Tools
Developer Tools
(16)Color Contrast Checker
Check contrast ratios between text and background colors to ensure WCAG accessibility compliance.
Developer Tools
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ASCII Text Art Generator
Convert text to beautiful ASCII text art banners instantly. Customize fonts, characters, spacing, and generate code comment blocks with 100% privacy.
Developer Tools
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CSV Column Analyzer
Analyze CSV files locally in your browser. Inspect column stats, missing values, duplicates, and perform clean-up actions with 100% privacy.
Developer Tools
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JWT Decoder
Decode and analyze JSON Web Tokens locally in your browser. Inspect headers, payloads, signatures, and claim definitions instantly.
Developer Tools
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Schema to LLMs Converter
Convert JSON-LD schemas, HTML documentation, or website details into clean, AI-ready llms.txt markdown formats.
Developer Tools
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SVG Responsive Optimizer
Optimize SVGs for responsiveness by removing fixed dimensions and adding viewBox support.
Developer Tools
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AI IDE Rules (.cursorrules) Generator
Create optimized .cursorrules and .clinerules files for Cursor, Windsurf, and Cline.
Developer Tools
JSON to Zod Schema Generator
Convert JSON objects into TypeScript-ready Zod schemas instantly.
Developer Tools
Audio Tools
(9)Audio Delay Calculator for Speakers
Calculate time alignment settings for secondary delay speaker lines at concert venues. Apply Haas effect precedence offsets to lock the sound image to the stage.
Audio Tools
Frequency Sweep Generator
Generate customizable audio frequency sweeps (20Hz to 20kHz) in your browser. Test subwoofers, speakers, and room acoustics with linear or logarithmic sweeps.
Audio Tools
LUFS Loudness Analyzer
Analyze the loudness of your audio files client-side. Get integrated LUFS, peak level in dBFS, and dynamic range measurements to match YouTube or Spotify specs.
Audio Tools
Mic Distance Delay Calculator
Calculate acoustic delay and sample offsets between microphones based on physical distance and air temperature. Visualize phase cancellations and comb filtering.
Audio Tools
Sample Rate Converter Calculator
Calculate audio file sizes, bandwidth requirements, and Nyquist frequencies. Understand aliasing effects when converting between 44.1kHz, 48kHz, and 96kHz.
Audio Tools
Tone Generator
Generate pure audio tones with sine, square, sawtooth, and triangle waves in your browser. Fine-tune frequencies to test hearing, align speakers, or tune instruments.
Audio Tools
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BPM Tap Detector
Tap along to the rhythm to calculate the BPM (Beats Per Minute) of any song instantly.
Audio Tools
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Hz to Note Converter
Convert any frequency in Hertz (Hz) to its corresponding musical note instantly.
Audio Tools
PDF Tools
(9) New
Add Page Numbers to PDF Free
Add page numbers to your PDF document client-side. Customize position, margins, font size, start page, format, and style instantly.
PDF Tools
PDF Splitter - Extract Pages Free, No Limits
Split a PDF into separate files or extract specific pages by range. Visual page previews, ZIP export, and no file size limits. 100% private.
PDF Tools
PDF Watermark Tool - Add Text or Logo, Free, No Upload
Add text or image watermarks to every page of a PDF. Control opacity, rotation, size, and position. No upload, no sign-up, instant download.
PDF Tools
Reorder PDF Pages - Drag & Drop, Free, No Upload
Rearrange, sort, or delete pages in any PDF using drag-and-drop thumbnails. No upload, no sign-up, no file size limit. Works in your browser.
PDF Tools
New Popular
JPG to PDF Converter - Free Online, No Upload
Convert one or multiple JPG images into a single PDF document. Reorder images by dragging, choose page size and orientation, and download instantly. 100% browser-based.
PDF Tools
PDF to JPG Converter - Free Online, No Upload
Convert every page of a PDF to high-quality JPG images instantly. Adjust quality, preview pages, and download individually or as a ZIP. 100% browser-based, no upload.
PDF Tools
Create Fillable PDF
Create interactive PDF forms online for free. Add text fields, checkboxes, and signatures to any PDF. 100% private, no upload required.
PDF Tools
Fill PDF
The ultimate free online PDF form filler. Automatically detect and fill interactive fields in any PDF document. 100% private, browser-side processing with no sign-up.
PDF Tools
Productivity Tools
(6) New
Custom Countdown Timer & Screensaver
A beautiful, customizable fullscreen countdown timer for event intermissions, presentation breaks, and online screensavers. Track meetings, study sessions, game releases, or exams with retro flip-clock, neon, light, and AMOLED themes.
Productivity Tools
Meeting Cost Calculator
Calculate the true cost of your meetings based on the number of attendees, their average salary, and meeting duration.
Productivity Tools
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Timezone Overlap Tool
Find the best meeting times for your remote team. Visualize working hours across multiple timezones and identify perfect overlaps.
Productivity Tools
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Fullscreen Focus Clock - Online Analog & Screensaver Clock
A beautiful, customizable fullscreen analog clock and focus screensaver. Perfect for study setups, desk secondary monitors, classroom smartboards, and streams.
Productivity Tools
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Focus Music BPM Matcher - Optimal Tempos for Coding & Study
Identify the best focus music bpm for studying, coding, or designing. Use the interactive Tap BPM counter to match track tempos and run custom binaural background pulses.
Productivity Tools
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Pomodoro Session Tracker - Cute Productivity Timer
A beautifully designed Pomodoro timer that tracks your deep work sessions, logs daily statistics, and helps you monitor distractions. Save your progress automatically with zero account required.
Productivity Tools
Game Tools
(11)Perfect Line Challenge
Draw a straight horizontal line and see how perfect it is. Test your hand-eye coordination, motor skills, and speed consistency with this interactive drawing game.
Game Tools
Emoji Catch Challenge
Test your reaction time and hand-eye coordination by catching falling emojis. Stay focused and avoid catching the wrong ones!
Game Tools
New Popular
Valorant Sensitivity Converter - Free Online Sens Calculator
Convert your mouse sensitivity from any game to Valorant instantly. Supports CS2, Apex, Overwatch 2, Fortnite, and 20+ games. Includes eDPI calculator and cm/360° output.
Game Tools
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Don't Shake - Hand Stability & Physics Tremor Test
Test your hand coordination and micro-tremor control! Try to keep the metallic marble balanced in the center of the tilting plate against simulated hand tremors.
Game Tools
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Loading Bar Reflex Game
Test your timing and reaction speed! Try to stop the progress bar at exactly 100.00% as it loads smoothly and consistently.
Game Tools
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Perfect Circle Test
Draw a circle and see how perfect it is. Test your hand-eye coordination and precision with this fun geometry challenge.
Game Tools
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Emoji Memory Challenge
Test your short-term memory by recalling sequences of emojis. See how many levels you can clear and discover your brain type.
Game Tools
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Time Perception Challenge
Test your internal clock. Can you stop the timer at exactly 10 seconds? Measure your precision and focus score.
Game Tools
Printables & Templates
(10) New
Don't Break the Chain Generator - Printable Habit Tracker
Design and print high-resolution custom Don't Break the Chain habit trackers. Choose beautiful color themes, layouts, cell shapes, and days. Download in PDF or JPG format for free, with optional watermark removal.
Printables & Templates
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Roblox Wanted Poster Generator
Create funny, custom Roblox wanted posters in seconds. Upload an avatar image, choose from different background themes, customize the crime or reward amount, and download high-resolution print-ready PDFs or PNG files. 100% free with no watermark.
Printables & Templates
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Keyboard Shortcut Cheat Sheet Generator
Design and print custom keyboard shortcut cheat sheets. Generate custom cheat sheets for VSCode, Figma, Notion, Blender, or upload your own app shortcuts. Export as print-ready PDF or high-res PNG.
Printables & Templates
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Lost Pet Flyer Generator - Free Printable Missing Poster Maker
Create highly visible, print-ready missing pet posters in seconds. Upload a photo, add automatic tear-off phone number strips, customize reward details, mark the location on a map, and download as a high-resolution PDF or PNG. 100% free, no watermarks, and no sign-up required. Designed to be incredibly fast and easy to use, helping you get your flyer ready without wasting precious time.
Printables & Templates
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Printable Baby's First Flight Certificate Generator
Create a beautiful, personalized Baby's First Flight Certificate. Choose from boy, girl, and adventure themes, customize flight details, add cute pilot stickers, and download print-ready PDFs.
Printables & Templates
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Event Ticket Generator
Design and print custom, professional-grade event tickets for free. Choose from gorgeous themes, generate unique barcodes/QR codes, and download multiple copies on a single A4 sheet.
Printables & Templates
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Custom Map Poster Generator
Create beautiful, high-resolution custom map posters for free. Perfect for "where we met" prints, anniversaries, and personalized wall art.
Printables & Templates
ADHD Daily Planner Generator
Create and customize a research-backed ADHD daily planner to reduce overwhelm. Features brain dump areas, energy tracking, and multi-layout (A4, A5, A6) PDF exports.
Printables & Templates