Tools that
do one thing.
A workbench of small, single-purpose tools for builders. Each one runs in a browser tab, needs zero setup, and does exactly what its name says. No upsell, no paywall, no “let’s jump on a call”.
Chronograph — Precision stopwatch + countdown timer. Laps, alarm, fullscreen.
A precision instrument for the workbench. Two modes, keyboard-first, fullscreen-ready. Built with vanilla logic and the Kiosk tokens — no frameworks, no analytics wall.
Image Compressor
Squash PNG/JPG/WebP in-browser with quality control.
Image Resizer
Resize to fixed dimensions or max pixels. EXIF stripped.
Image Converter
PNG ↔ JPG ↔ WebP ↔ AVIF. No upload, no watermark.
HEIC to JPG
iPhone photos to JPG in one drop. Batch friendly.
Image Cropper
Crop with aspect presets. Round, square, OG-image.
Screenshot Beautify
Drop a screenshot, frame it with gradient, shadow, padding.
Video Compressor
H.264 re-encode with target size. Runs via ffmpeg.wasm.
Video to GIF
Trim, scale, export a loopable GIF — all local.
Audio Compressor
Shrink MP3/AAC/OGG without killing clarity.
Media Converter
One tool, dozens of format pairs. No queueing.
Audio Extractor
Pull clean MP3/WAV audio from any video.
Voice Recorder
Record mic with live waveform. Mono 16k/24k WAV + metadata.
JSON Formatter
Pretty-print, minify, diff two JSON blobs side-by-side.
Code Minifier
Minify JS / CSS / HTML. Copy-ready, no dependencies.
Base64 Encoder
Encode or decode text and files with one click.
QR Generator
Generate crisp SVG/PNG QR codes. Wi-Fi & vCard presets.
Color Picker
Drop an image, steal its palette. HEX · OKLCH · RGB.
PDF Compressor
Crush a 40 MB PDF to 4 MB. Readable, emailable.
Unit Converter
Length, weight, currency, timezones — one screen.
Timezone Converter
What time is 10am PT in Taipei? Answered fast.
ZIP Creator
Drag files, press ZIP, download. No server.
Markdown Preview
Live preview a .md file with GitHub styling.
LaTeX Preview
Render LaTeX math live with KaTeX. Inline + block.
Markdown to Google Docs
Convert Markdown to a paste-ready Google Doc. Roboto + LaTeX math.
Chronograph
Precision stopwatch + countdown timer. Laps, alarm, fullscreen.
2FA Authenticator
Generate TOTP codes offline from your otpauth:// URIs.
Password Generator
Strong passwords, passphrases, PINs. Entropy meter. Local-only.
App Stats
Lookup iOS/Android app ranks & trends by country.
UTM Generator
Build tagged campaign URLs without a spreadsheet.
IP Lookup
Reverse an IP to ASN, geo, ISP, and abuse rep.
Peepbo
A little terminal toy for whenever you need one.
Mortgage Calculator
Monthly payment, amortization, total interest paid.
HELOC Calculator
Home equity line of credit — payoff vs. draw.
Leverage Calculator
Position size, max loss, liquidation for any leverage.