qwertywelch.com

Free online audio format converter utility

Create and share 16-step beat box drum patterns with synthesized kick, snare, hi-hat, and clap sounds in the browser.

A fullscreen classroom and projector countdown timer with presets, shareable settings, sound alerts, and large high-contrast display modes.

A reading-first editorial microsite with loud magazine-style playbooks, a creator archetype quiz, and a headline/bio generator—big energy, still useful.

Convert CSV data to JSON and JSON to CSV with custom delimiters, header options, and pretty formatting. Free online converter tool.

Calculate days, weeks, and calendar months between two dates online. Optional IANA timezone, strict validation, and copy-friendly results.

Generate a whimsical egg character card with a seeded name, shell traits, face, accessory, mood, and copy-ready personality blurb.

Pick or paste a hex color, convert to RGB, HSL, and HSV, generate harmony swatches and tint/shade strips, copy values, and export CSS or JSON. Runs in your browser on qwertywelch.com.

Detect visually confusable Unicode characters and convert them to safer ASCII or normalized Unicode. Free homoglyph converter and confusables checker that runs locally in your browser.

Free online house paint coverage calculator utility

Convert images between formats instantly in your browser. Powered by Rust/WASM. Supports JPEG, PNG, WebP, GIF, BMP, TIFF, ICO, QOI, TGA, AVIF, SVG, and HEIC.

A free online json formatter and validator tool

Convert Markdown to editable rich text in your browser, paste from Word or Google Docs, normalize formatting, then print or export to PDF—all locally on qwertywelch.com.

Free online midi player & piano roll utility

Interactive mortgage calculator for monthly PITI, total interest, total paid, optional yearly amortization, and shareable URL scenarios.

Fetch Open Graph and Twitter Card metadata from a public URL, preview Facebook, X/Twitter, and LinkedIn-style cards, override fields locally, and export HTML meta tags or JSON.

Free online primitive 3d shape visualizer utility

Create custom QR codes for URLs, text, contact information, and more with our free online QR Code Generator.

Single-page unit converter for common quantities (length, weight, volume, temperature) with a minimal, fast UI.

Generate strong random passwords with customizable length and character sets. Free secure password generator that runs entirely in your browser.

A simple note-taking tool with cloud sync. Proof-of-concept for backend-enabled tools with isolated per-tool databases.

Convert text case online instantly: uppercase, lowercase, title case, sentence case, camelCase, snake_case, kebab-case, and more. Free, private, runs in your browser.

Count characters, words, sentences, paragraphs, and estimate reading time with our free online text counter tool.

A lightweight in-browser text diff checker that compares two text inputs and highlights additions, deletions, and changes with inline diff visualization.

Reverse text, reverse word order, sort lines, shuffle lines, remove duplicate lines, and renumber lines online. Fast in-browser text reverser and line sorter.

Convert input text into spoken audio using the browser's speech synthesis API. No server required - all processing happens locally in your browser.

Convert between Unix timestamps and human-readable dates. Supports timezone conversion and bidirectional conversion.

A free online tool to encode and decode URLs, converting special characters to their percent-encoded representations and vice versa.

Free online user agent parser & device detector utility

Generate UUIDs/GUIDs online. Supports UUID v1, v4, and v5. Free, fast, and secure UUID generator.

Free online wcag quick contrast utility

Instantly see your public IP address with IP version, approximate location, timezone, ISP, and ASN. Look up another IPv4 or IPv6 address with shareable URLs.

Free online zip archive explorer utility