Web Tool, Web Game and AI Chatbot

Website providing Web Tool, Web Game and AI Chatbot

42 tools
Runs in your browser
No sign-up, no limits
Jump to any tool with Ctrl K
All
Tools
Pay & Money
Simulators
Dev Tools
Design
AI
Tools
19
Character Counter
Count characters with and without spaces, words, bytes and manuscript pages
PDF Tools — Merge, Split, Rotate
Combine PDFs, drop pages, reorder, rotate and turn images into a PDF, without uploading anything
Screen Recorder
Record your screen, your camera or both together with microphone and system sound — no install, no watermark
Online Timer & Stopwatch
A countdown timer, an interval timer for training, and a stopwatch with laps — the alarm still fires on time from a background tab
Percentage Calculator
Percent of a number, percent change, discounts, VAT and working backwards — seven versions of the question on one page
BMI, Ideal Weight & Calorie Calculator
BMI on both the Asia-Pacific and WHO scales, the healthy weight range that goes with it, basal metabolic rate, daily calories and waist-to-height ratio
Date & Age Calculator
D-day, exact age, days between two dates and business-day arithmetic
Unit Converter
Length, area, weight, volume, temperature, speed, data and time at a glance
World Clock & Meeting Planner
Track live time across cities and find a meeting slot everyone can make
Scientific Calculator
Trigonometry, logarithms, factorials and constants with live results and history
Text to Speech
Read any text aloud with the voices built into your device — free and private
Speech to Text
Dictate and transcribe speech in your browser — free, no API key
Markdown Html Converter
Convert between Markdown and Html
QR Code Barcode Generator
QR Code Barcode Generator
Guitar Chord Player
Type a line of chords and hear them strummed, with the fingering for every shape
Audio Converter & Trimmer — WAV to MP3
Cut a piece out of a WAV or MP3 on a waveform and save it as MP3 or WAV — nothing is uploaded
Voice Isolator — Remove Background Music from Speech
Pull the voice out of a clip and drop the music and sound effects behind it, with an AI model that runs in your browser — nothing is uploaded
Sound Effect Maker — Success, Error, Notification
Make the success, failure, error and notification sounds an app needs — synthesised in your browser, free to use
Beat Maker
Build a drum loop with chords and bass, then keep it as a WAV — free and entirely in your browser
Pay & Money
1
Loan & Savings Calculator
Monthly repayments, total interest, a full schedule, and savings at maturity
Simulators
1
Random Picker — Ladder, Wheel, Teams
Draw lots with a ladder game, spin a wheel, or split a group into teams — and share the exact result as a link
Dev Tools
13
JSON Formatter & Validator
Format, validate, minify and inspect JSON in your browser
JWT Decoder
Decode JWT header, payload and claims locally — nothing is uploaded
Hash & HMAC Generator
SHA-1, SHA-256, SHA-384, SHA-512 and HMAC for text or files
ID Generator
Generate UUID v4, UUID v7, ULID and Nano ID in bulk
Unix Timestamp Converter
Convert epoch timestamps to dates across time zones
Regex Tester
Test regular expressions live with capture groups and flags
Encoder / Decoder
Base64, Base64URL, URL, HTML entity and hex conversion
Text Diff
Compare two texts line by line and see what changed
Cron Expression Generator & Parser
Build cron expressions, read them in plain English and preview the next runs
Case Converter & Text Toolkit
Convert camelCase, snake_case, kebab-case and more, then tidy up your lines
JSON to TypeScript Converter
Turn any JSON payload into TypeScript interfaces, types or JSDoc in one paste
cURL Converter
Convert a cURL command into fetch, axios, Python requests or Go code
Password & Secret Generator
Generate strong passwords, passphrases and API keys with a real entropy meter
Design
7
Color Contrast Analyzer
Analyze color contrast and recommend colors
Icon Generator
Icon Generator
CSS Generator
Box shadow, gradient, border radius and transform with a live preview and copy
Background Remover
Cut the background out of a photo and save a transparent PNG — no upload, no account
ID & Passport Photo Maker
Crop a photo to passport, visa or résumé size at 300 dpi, change the backdrop, and lay out a print sheet
Image Converter & Compressor
Convert and compress images to WebP, PNG or JPEG — nothing leaves your browser
AI Watermark Remover
Erase the corner sparkle from Gemini and Nano Banana images, a whole batch at once, in your browser
AI
1
MBTI SAJU
MBTI & Saju Relationship Analysis

What is this?

A collection of small, focused tools for people who build things for the web — the ones you end up searching for mid-task, then closing again five minutes later. Every one of them runs entirely in your browser: no account, no upload, no usage limit, and nothing you paste ever reaches a server.

What is in here

Tools
General-purpose tools: a world clock with a meeting planner, a scientific calculator, text-to-speech and dictation, Markdown conversion, and QR code and barcode generation and scanning.
Pay & Money
Pay and money: work out loan repayments and the interest on savings and deposits before you commit.
Simulators
Simulators: run a lottery draw thousands of times over and watch what the odds actually look like, rather than being told the number.
Dev Tools
Everyday developer utilities: format and validate JSON, decode a JWT, read a cron expression, generate types from an API response, convert a cURL command into code, hash a file, or look up what a 422 actually means.
Design
Visual work: check colour contrast against WCAG, build a layered box shadow or gradient, compress images to WebP, and generate a full favicon set from one source image.
AI
An AI reading that combines MBTI with Korean saju, for entertainment.

Keyboard shortcuts

Press Ctrl+K (or ⌘K on a Mac) anywhere to open the command palette and jump straight to a tool. A bare / does the same. Arrow keys move, Enter opens, Escape closes. Star a tool to pin it to the sidebar.

Why everything runs locally

These tools process the kind of data you should not be pasting into a stranger’s server: production JSON, access tokens, customer records, internal config. Doing the work in JavaScript on your own machine removes that question entirely — you can verify it by opening your network tab and watching nothing happen.