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”.
Repodle — Guess today’s trending GitHub repo. 6 tries, daily, shareable.
A daily puzzle built on live data: one repo from today’s GitHub trending list, six guesses, a new clue per miss. Same puzzle for everyone, emoji grid to share, resets at 00:00 UTC.
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.
EXIF Viewer
View hidden camera, lens & GPS metadata in any photo, then remove it before you share.
Photo Timestamp
Stamp a digital date/time on your photos from EXIF or file date, then export as ZIP.
Carousel Split
Split one photo into a seamless Instagram carousel or 3x3 grid — free, in-browser, no upload.
Watermark
Add a text or logo watermark — tiled anti-theft or single branded mark, batch export to ZIP.
Print & Passport Photo
Passport photo maker + resize to 4x6/5x7/8x10 at 300 DPI — free, no upload.
Vintage Filter
Dazz Cam / OldRoll style vintage filters — 11 presets incl. CPM35, D Classic, NT16 looks.
Duplicate Photo Finder
Find duplicate & near-duplicate photos with perceptual hashing — nothing is uploaded.
Long Press Image
The viral X trick — brushed areas vanish in the feed and reveal on long press.
Photo Measure
Set a scale from something of known length, then label real distances and areas on a photo.
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.
Video Trimmer
Cut a clip by timecode — fast keyframe copy or frame-accurate re-encode. Runs via ffmpeg.wasm.
Add Music to Video
Add or swap a soundtrack on any video, lossless and in-browser.
Slideshow Maker
Turn photos into an MP4 slideshow with transitions and music, right in your browser.
Photo Booth
Classic 4-shot webcam photo strip with filters — free, in-browser, no upload.
Audio Trimmer
Cut MP3/WAV on a waveform with drag handles, fades, and lossless MP3 copy export.
Tone Generator
20 Hz–20 kHz tones, L/R speaker test, and a 165 Hz water-eject cycle — no app needed.
Decibel Meter
Approximate dB SPL from your mic — live bar, peak hold, average, and a 60s chart.
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.
QR Reader
Decode QR codes from an image, pasted screenshot, or live camera — free, no upload.
HTML Preview
Live sandboxed HTML editor + preview with device widths — code never leaves your browser.
PGP Tool
Generate keys, encrypt, decrypt, sign & verify with OpenPGP.js — keys never leave your device.
DNS Lookup
Query A, MX, TXT, NS + more via Cloudflare or Google DoH — with TTLs, from your browser.
Speed Test
Download, upload, latency & jitter in ~20s — measured against Cloudflare, no sign-up.
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.
Fancy Font Generator
Type once, copy 114 text styles — bold, script, fraktur, glitch, frames, upside-down, vaporwave.
Unzip Files
Open a ZIP in-browser: file tree with sizes, inline previews, extract one file or all.
VCF to CSV
Convert contact vCards to Excel or Google Contacts CSV — parses 2.1/3.0/4.0, no upload.
Invoice Generator
Free invoice with line items, tax, discount & logo — print straight to PDF, nothing uploaded.
PDF Merger
Merge, split and rotate PDFs in your browser — page ranges like 1-3,7, no upload.
File Transfer
Send files phone-to-laptop over a direct P2P link — code or QR, no upload, no size limit.
Sign PDF
Draw or type a signature, drop it on any page, download a flattened PDF — no upload.
Repodle
Guess today’s trending GitHub repo. 6 tries, daily, shareable.
Star Duel
Higher or lower: which trending repo has more stars?
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.
Teleprompter
Fullscreen auto-scrolling script reader with mirror mode — free, no upload.
Golden Hour Calculator
Sunrise, sunset, golden & blue hour times for any city — free, in-browser.
Moon Phase Calendar
Today's moon phase, illumination, moonrise/set and a monthly phase calendar.
Countdown Timer
Drift-free countdown with alarm, progress ring, fullscreen, and Pomodoro presets.
Morse Code Translator
Text ↔ morse both ways, with 600 Hz audio playback at 5–30 WPM and screen-flash mode.
Random Name Picker
Spinner wheel, Pick-N and random team splitter — 10,000+ names, provably fair, no sign-up.
Dice Roller
Roll d4–d100 with 3d6+2 notation and advantage — crypto-random, provably fair.
Online Ruler
Actual-size cm/mm/inch ruler — calibrate with any bank card, drag the marker to measure.
Bubble Level
Spirit level on your phone — bull's-eye + edge bar, degree readout, calibrate to zero.
Text to Speech
Read any text aloud with your device's own voices — speed, pitch, no character limit.
Date Calculator
Days between dates, business days, and date plus-or-minus — free, in-browser.
Time Card Calculator
Weekly timesheet: clock in/out, breaks, overtime split, and gross pay — in-browser.
Stair Calculator
Stair stringer math: risers, treads, angle, IRC code check + to-scale diagram.
Pool Calculator
Pool volume in gallons or liters, plus chlorine, pH and alkalinity doses.
Conduit Bend Calculator
Offset, saddle and 90° stub marks for EMT — multipliers, shrink and take-up.
Land Area Calculator
Trace a parcel on a map to get acres, sq ft, m² and hectares plus perimeter.
Duct Size Calculator
Ductulator online — CFM to round or rectangular duct size, with a velocity check.
Cut List Optimizer
Nest plywood parts onto sheets with kerf and grain locks — printable layouts.
Miter Angle Calculator
Flat miters, crown compound miter and bevel, and polygon segment angles.
Voice to Text
Live speech-to-text in 77 languages with timestamps and TXT export — no sign-up.
Local AI Chat
Chat with an LLM running on YOUR GPU via WebGPU — no API key, zero data leaves the device.
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.