Frontend Tools
launchtimer: Embeddable Countdown for Product Hunt Launches
SvelteKit static export needed a launch countdown with timezone display and localStorage dismiss — 95 lines, embed via iframe or snippet.
·10 min read
Frontend Tools
Copy-paste vanilla JS tools — formatters, converters, calculators. No backend required.
Frontend Tools
unitbox: One Page, Twelve Unit Categories, Zero React
Travel blog needed km/mi, °C/°F, kg/lb in one static URL. Tabbed converter with shared engine and localStorage last category.
·12 min read
Frontend Tools
passgen: Cryptographically Random Passwords Without crypto.randomUUID Hacks
Team shared passwords in Slack. Built a generator using crypto.getRandomValues with zxcvbn-style strength scoring — no npm.
·10 min read
Frontend Tools
mortcalc: Amortization Table That Beat the Spreadsheet for Client Demos
Real estate landing page needed monthly payment + amortization without embedding a third-party iframe. Pure math, printable table.
·11 min read
Frontend Tools
bffit: Navy Method Body Fat Calculator for a Fitness Static Site
Client wanted a no-backend BMI + Navy body fat widget for AdSense traffic. Full form math, input validation, and metric/imperial toggle.
·10 min read
Frontend Tools
epochkit: Unix Timestamps With Timezone Sanity and Saved Favorites
Debugging webhook logs across UTC and local. Converter plus localStorage favorites for the five API environments I juggle daily.
·10 min read
Frontend Tools
pdftext: Extract Resume Text in the Browser (No Upload to sketchy sites)
HR workflow needed plain text from PDFs on a locked-down laptop. pdf.js in a static page — page-by-page extraction with progress bar.
·13 min read
Frontend Tools
hexrgb: Design Handoff Colors Without Opening Figma
Freelance landing page needed hex ↔ rgb ↔ hsl with live preview. One input field, three outputs, clipboard copy — 75 lines of JS.
·9 min read
Frontend Tools
qrgen: Static QR Codes Without qrcode.react or a Backend
Event flyer needed WiFi QR codes. Embedded a 4KB QR library via CDN with offline fallback table — full vanilla page.
·11 min read
Frontend Tools
imgshrink: Client-Side JPEG Compression Before Cloudinary Quota Hit
Blog contributors uploaded 8MB phone photos. Canvas-based compressor cut uploads 85% with quality slider and max-width — no server.
·12 min read
Frontend Tools
urlcodec: When encodeURIComponent Broke My Query String Builder
Debugging UTM links for a static newsletter. Built encode/decode with component vs full URI modes and a live query-string parser.
·9 min read
Frontend Tools
b64tool: Encode Images to Data URLs Without Uploading to Random Sites
Needed Base64 for a static site's inline SVG fallback. Built encode/decode with file picker, UTF-8 safety, and the atob Unicode crash fix.
·10 min read
Frontend Tools
wordcount: Twitter-Style Limits Without a Backend (And the Unicode Bug)
Meta description counter for a static blog editor. Grapheme-aware counting fixed the emoji length mismatch that cost me a rejected guest post.
·9 min read
Frontend Tools
caseflip: Fix camelCase ↔ snake_case Without Leaving the Browser
Freelance API integration needed batch field renames. Built a 90-line case converter that handles edge cases like HTTPHeader and iOS-style acronyms.
·10 min read
Frontend Tools
jsonfmt: A Zero-Dependency JSON Formatter That Survived 40MB Paste Tests
Built a browser JSON formatter after every online tool choked on a minified API dump. Full vanilla JS, syntax validation, and the parse errors that actually matter.
·11 min read