qwertywelch.com / 42 tools
The full directory.
Every tool, A to Z. Search by name or task, or narrow the list by category.
Tool index
3D Shapes
Explore 3D shapes and calculate volume and surface area.
Asset Catalog Explorer
Browse compiled Apple .car files and extract images and metadata.
Audio Converter
Convert audio files between MP3, WAV, and other formats.
Base64 Encoder Decoder
Encode and decode UTF-8 text and files as Base64 or URL-safe Base64 in your browser without uploading data.
Beat Maker
Build drum patterns on a 16-step sequencer.
Case Converter
Change text to uppercase, lowercase, title case, and coding styles.
Color Contrast Checker
Check text and background colors against WCAG contrast thresholds.
Color Picker
Convert color values and build palettes with tints and shades.
Countdown Timer
Set a countdown with a fullscreen display and sound alerts.
CSV to JSON
Convert CSV tables to JSON, or JSON back to CSV.
Date Difference
Count days, weeks, and calendar months between two dates.
Egg Character Generator
Make an egg character with a name, face, and personality.
Favicon Generator
Create PNG icons, a multi-resolution ICO favicon, and a web manifest from an image in your browser.
File Checksum Verifier
Compare a local file with its published SHA-256 checksum.
Image Compressor & Resizer
Resize and compress multiple PNG, JPEG, and WebP images privately in your browser.
Image Converter
Convert images between PNG, JPEG, WebP, and other formats.
IP Address Lookup
Look up an IP address, network, and approximate location.
JSON Formatter
Format or minify JSON and check for syntax errors.
Layered Stencil Maker
Separate images into stencil layers and check disconnected shapes.
Link Preview Checker
Inspect a page's metadata and preview its social link cards.
Lookalike Character Checker
Find visually similar Unicode characters and inspect their replacements.
Markdown Editor
Turn Markdown into editable rich text, then copy or print.
Meeting Overlap Planner
Find shared working hours across time zones and export a meeting.
MIDI Player
Play MIDI files and follow notes on a piano roll.
Mortgage Calculator
Estimate mortgage payments with taxes, insurance, and total interest.
Notes
Write, edit, and save notes in your account.
Paint Calculator
Estimate paint quantities from wall area, coats, and coverage.
Password Generator
Generate passwords with your chosen length and character sets.
PDF Merge & Split
Merge, reorder, and extract PDF pages privately in your browser.
QR Code Generator
Make QR codes for links, text, contacts, and Wi-Fi details.
Read Aloud
Listen to text with adjustable voice, speed, and pitch.
Recipe Batch Scaler
Scale an ingredient list to new servings, including fractions.
Regex Tester
Test JavaScript regular expressions, inspect matches, and preview replacements privately in your browser.
Text & Line Sorter
Reverse text, sort or shuffle lines, and remove duplicate lines.
Text Compare
Compare two texts and highlight added or removed words.
Unit Converter
Convert length, weight, volume, and temperature measurements.
Unix Timestamp Converter
Convert Unix timestamps to dates, or dates to timestamps.
URL Encoder / Decoder
Encode or decode complete URLs and individual parameter values.
User Agent Parser
Read browser, operating system, and device details from user agents.
UUID Generator
Generate UUIDs individually or in batches.
Word & Character Counter
Count words and characters, then estimate reading and speaking time.
ZIP Explorer
Browse ZIP folders, preview text files, and extract individual entries.