Free online tools

Multilingual AI Grammar & Spelling Checker

Automatically detect the input language and correct grammar, spelling, typos, punctuation, and awkward phrasing.

🔎

AI Product Fair Price Research

Submit a product URL or a plain-language request to compare sellers and similar products, estimate a fair price range, and surface purchase checks.

🪄

Portrait Background Remover

Remove portrait backgrounds with on-device AI and save a transparent PNG.

🎨

AI Image Playground

Transform photos of people, pets, objects, and places into character cards, posters, figures, and more.

Creator & streaming

Cutmix AI Video Maker

Turn a story into Shorts or long-form video with AI-planned scenes, images, voice, and an export-ready MP4 workflow.

📣

Viewer Submissions, Polls & Giveaways

Create an audience room to collect submissions, run live polls, moderate entries, and draw giveaway winners.

📸

Social Media Photo Editor

Resize and enhance photos for Instagram posts, Stories, Reels, X, blogs, and YouTube thumbnails, then add text and export.

🎙️

Microphone Recorder & Trimmer

Record audio, view its waveform and save a selected section as WAV.

🎛️

Live Microphone Voice Changer

Apply robot, deep voice, radio, monster and echo effects to your microphone in real time and route the result to OBS.

💬

SRT & WebVTT Subtitle Toolkit

Shift subtitle timing and convert between SRT and WebVTT.

AI Auto Captions for Shorts & Reels

Transcribe short videos, edit word timing, and export a captioned MP4 or SRT file.

🗳️

Shared Poll & Date Picker

Share a poll link and collect participant choices in real time.

Creator Image Resizer

Resize one image for Chzzk, Twitch, SOOP and YouTube presets.

⏱️

OBS Stream Countdown

Create a chroma-key countdown URL for an OBS browser source.

▶️

YouTube Thumbnail Grabber

View and download thumbnails in multiple sizes from a video URL.

Calculators & life

📆

D-Day Calculator

See exactly how many days remain until a special date.

🗓️

Date & Weekday Calculator

Find the difference between dates, count weekdays and add days.

🔳

QR Code Maker & Reader

Create URL and Wi-Fi QR codes or read a QR image.

APPiOSAndroid

아고(I-GO)

Turn everyday walks into a rewarding habit

APPAndroidWeb

운세GPT

AI-powered saju, tarot, and horoscope readings

💱

Calculators & lifeSouth Korea rules

Official Exchange Rate Calculator

Convert currencies with ECB reference rates and compare their 90-day trend.

💼

Salary, Severance & Leave

Estimate net salary, severance, weekly holiday pay and leave under South Korean 2026 rules.

📈

Average Cost Calculator

Calculate the new average price, quantity and cost after another purchase.

🎂

Calculators & lifeSouth Korea rules

Full Age Calculator

Calculate age from a birth date and reference date using the international birthday-based method.

🪖

Korean Military Discharge Date

Estimate a South Korean military discharge date from enlistment date and service months.

🏷️

Discount & Deduction Calculator

Calculate coupon prices and estimated net amounts after a percentage deduction.

📐

Everyday Unit Converter

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

🧮

Calculators & lifeKorean names

Scientific Calculator

Calculate trigonometric functions, logarithms, powers and factorials with memory and calculation history.

🛂

Korean Name Romanization Suggestions

Compare several Romanized spellings using common family-name forms and Revised Romanization.

🎓

GPA Converter

Convert between 4.3, 4.5, 4.0 and 100-point grading scales.

📍

Random Place Nearby

Pick a random restaurant or cafe within your chosen radius.

🧾

Split Bill Calculator

Split first and second rounds and create a payment request message.

🌙

Sleep Cycle Calculator

Estimate good sleep and wake times using 90-minute sleep cycles.

💧

Daily Water Intake Calculator

Estimate daily water needs from weight, activity, and climate.

Culture & events

🎤

Global Concert & Tour Finder

Search upcoming concerts worldwide by artist, city, country, and date, then visit the official ticket provider.

📚

Book Search & Reading List

Find books and editions by title, author, or ISBN, then save a personal reading list.

🖼️

Museum Explorer

Explore The Met collection by artist or theme and curate a personal exhibition.

Game dataSouth Korea rules

Upcoming Movie Calendar

Browse upcoming theatrical releases by country and date, watch trailers, and save a personal watchlist.

Game data

🍁

Game data

MapleStory Character Lookup

Look up a character's level, key stats, Union, Mu Lung Dojo record and equipped items by name.

⚔️

Dungeon & Fighter Character Lookup

Search Korean DNF characters and inspect fame, stats, buff enhancement and equipped items.

Search & data

🌤️

Global Weather & Outfit Guide

Check current conditions, a 5-day forecast and air quality for any city, with practical umbrella and outfit tips.

🚀

NASA Space Data Explorer

Explore the astronomy picture of the day, near-Earth objects for the next week, and recent solar activity.

⚡

Global EV Charger Finder

Find EV charging locations and connector information near cities worldwide.

🌍

Global Country Data Comparison

Compare GDP, population, life expectancy and other official World Bank indicators.

🌋

Live Global Earthquake Map

Explore the magnitude, location and depth of recent earthquakes using the live USGS feed.

🔬

Research Trend Explorer

Search OpenAlex research and explore publication trends, citations, and open-access availability.

🦋

Nearby Biodiversity Guide

Discover animals, plants, and fungi observed around your location using GBIF records.

Images & documents

✍️

Word & Character Counter

Count words, characters, lines and UTF-8 bytes in real time.

🖼️

Image Compressor & Resizer

Import SVG, JPG, PNG or WebP images, then resize, compress and export them as JPG, PNG or WebP.

✂️

Image Cropper & Rotator

Crop a photo to a custom ratio, rotate or flip it, and save it as JPG, PNG or WebP.

📄

Merge & Split PDF

Merge PDFs, extract pages, rotate documents or turn images into a PDF.

▦

Markdown Table Generator

Paste spreadsheet or CSV data and turn it into an aligned Markdown table.

📤

Expiring File Transfer

Upload a file up to 10MB and create an expiring download link.

💧

Batch Watermark Studio

Apply a text or logo watermark to multiple photos at once.

📝

Markdown Editor & HTML

Write Markdown with a live preview and copy the converted HTML.

↔️

Text Diff Checker

Compare original and revised text line by line with additions and removals highlighted.

Random picks

🔢

Random Number Picker

Draw secure random numbers with custom ranges, exclusions and duplicate rules.

🎡

Name Wheel

Paste names or choices and spin an animated wheel to pick a winner.

👥

Random Team Generator

Shuffle a participant list into evenly distributed teams.

🔀

Random Order Picker

Randomize presentation, chore or game order in one click.

🎱

Lottery Number Generator

Create 6/45 or fully custom random number combinations.

🎲

Coin Flip & Dice Roller

Flip multiple coins or roll dice from D4 through D100.

🪜

Ladder Game

Build a random ladder that connects every player to an outcome.

🎁

Capsule Draw

Put choices or challenges into colorful capsules and open one.

🏆

Tournament Bracket Maker

Randomly seed players and export the bracket as a PNG.

⚖️

Balanced Team Matcher

Use player scores to build teams with similar overall skill.

Tests & devices

✨

My Energy Type

A light personality test with just five questions.

⚡

Reaction Time Test

Click when the screen changes color and measure your reaction time in milliseconds.

📏

APPWindowsmacOSUnder review

On-Screen Ruler

Calibrate your display with a bank card, then measure horizontal and vertical lengths in cm, inches or pixels.

SendMouse

Turn your phone into a mouse, keyboard, and PC remote

🖥️

Dead Pixel & Retention Test

Cycle full-screen solid colors to inspect pixels and image retention.

⌨️

Keyboard N-Key Test

Check every key, maximum simultaneous input and keyboard ghosting.

🖱️

Mouse Polling & Click Test

Estimate polling rate and test buttons, double-clicks and wheel input.

👁️

Color Vision Challenge

Find the subtly different tile and measure your color sensitivity.

🧠

Number Memory Test

Remember flashing digit sequences and enter them in order.

🎵

Absolute Pitch Test

Listen to a note and identify it from the musical scale.

⌨️

Typing Speed Test

Type a short passage and measure WPM, accuracy and time.

➗

One-minute Mental Math

Solve arithmetic for 60 seconds and compare your ranking.

Games

🤳

Heads Up Word Game

Hold your phone to your forehead and guess global words from your friends' clues in this free party game.

📸

Name the Famous Person Photo Quiz

Look at portraits of globally known people and say each name before the timer runs out.

🏆

Custom Favorite Tournament

Run a knockout tournament with your own food, movie or game candidates.

APPUnder review

Aim Trainer

Click random targets to measure mouse speed and accuracy.

⚫

Tic-tac-toe & Gomoku

Play locally or challenge a friend using a room code.

🧠

Memory Card Match

Remember the hidden cards and match every pair as fast as possible.

🧱

Play 2048 Online

Merge matching number tiles with arrow keys or swipes and try to reach 2048.

💣

Play Minesweeper Online

Use number clues to avoid mines and reveal every safe square.

Audio & video

🌧️

Focus Sound Mixer

Mix synthesized rain, fireplace and café sounds for focus or relaxation.

🥁

BPM Tap Tempo

Tap along to music to measure its BPM and your rhythmic consistency.

〰️

Frequency Tone Generator

Play waveforms at any frequency from 20 Hz to 20 kHz.

APPiOSAndroidWeb

mallo

Practice real conversations through voice messages

🎞️

Video to GIF Converter

Trim part of a video and turn it into a GIF entirely in your browser.

🏃

GIF Speed & Size Optimizer

Adjust GIF speed, frame rate, dimensions and color count.

📸

Video Frame Extractor

Capture an exact video moment as a high-quality PNG.

Design & content

🖨️

Print Size & DPI Calculator

Calculate print DPI and recommended pixels from image and paper sizes.

🌓

Before & After Image Compare

Overlay two images with a comparison slider and export them side by side.

🪟

CSS Shadow & Glass Generator

Tune box shadows and glass effects visually, then copy the CSS.

APPiOSAndroid

AI Outfit Shot

Create virtual try-on shots from model and clothing photos

🔤

Web Font Preview

Compare the same text across common system fonts and sizes.

🌐

Favicon Generator

Turn an image into 16, 32 and 48px PNGs and a favicon.ico set.

📊

Chart Image Generator

Turn values into clean bar, pie or line charts and save PNGs.

☁️

Word Cloud Generator

Analyze word frequency and create a downloadable word cloud.

🧩

Text to Mind Map Generator

Automatically arrange an indented outline and export a polished PNG or SVG mind map.

🧠

Online Mind Map Maker

Connect, drag, and style nodes to organize ideas, projects, and study notes visually.

💬

Social DM & SMS Chat Image

Create a conversation image in Social DM, SMS or minimal styles.

🤣

Meme Caption Maker

Add top and bottom captions to an image and save a shareable meme.

🖌️

Screen Color Picker & Image Eyedropper

Pick any screen or image pixel under your pointer and copy its HEX, RGB, HSL, and HSV color codes.

🎨

Image Color Palette Extractor

Upload an image and extract its main colors as a HEX and RGB palette.

🌈

CSS Gradient Generator

Adjust colors and direction, preview the gradient, and copy the CSS code.

✨

Glitch & Zalgo Text Generator

Transform ordinary text into glitch, Zalgo, and decorative Unicode styles.

🧾

Image to ASCII Art Converter

Convert an image into copyable text art using character-based brightness.

Developer tools

🧹

CSV Cleaner & JSON Converter

Clean empty or duplicate rows in CSV and TSV, then export JSON.

🕰️

Timestamp & World Time Converter

Convert Unix timestamps and ISO dates while comparing world time zones.

#️⃣

File Hash & Checksum Checker

Calculate SHA checksums locally and compare them with a supplied value.

🗜️

gzip Text Compressor

Compress text to gzip Base64 or restore the original text.

🔗

URL & Open Graph Preview

Inspect page metadata and preview its social sharing card.

🗂️

Bookmark & Link Organizer

Save useful URLs by category, add notes and favorites, and find them again quickly.

🩺

HTTP, SSL & DNS Diagnostics

Inspect response time, security headers, DNS and TLS certificates.

📥

Temporary Webhook Inbox

Create a 24-hour URL and inspect incoming HTTP headers and bodies.

🔐

One-Time Encrypted Note

Send a browser-encrypted secret through a link that opens only once.

📡

Website Uptime Monitor

Track a public URL's availability and response times.

🧪

Temporary Mock API

Create a seven-day test API with a custom status and response body.

📏

PX, REM & EM Converter

Convert CSS units using custom root and parent font sizes.

📐

SVG Code & PNG Studio

Preview and optimize SVG code or render it as a downloadable PNG.

🧩

JSON Formatter & Validator

Format JSON with readable indentation and find syntax errors before using the data.

🔐

JWT Token Decoder

Decode JWT header and payload data locally in your browser without verifying the signature.

⏱️

Cron Expression Generator

Build a cron schedule from simple choices and read a plain-language explanation.

🧪

Mock Data Generator

Generate test names, emails, phone numbers, and addresses as JSON or CSV.

🧩

Regular Expression Tester

Test a regular expression and flags against text with live match highlighting.

🔑

Strong Password Generator

Create a secure random password from your chosen length and character rules.

🔄