Everyday Dev Tools
free developer tools that work offline, in your browser
What it does
Everyday Dev Tools is a free, privacy-first toolkit for developers. It brings 13 essential utilities into one place, including JSON Formatter, JSON Diff, JSON-to-CSV, Text Diff, Unix Timestamp, Cron Generator, JWT Decoder, Base64, URL Encoder, Hash Generator, UUID Generator, Regex Tester, and Markdown Previewer. Everything runs locally in your browser with no sign-ups, tracking, or data uploads. Fast, lightweight, mobile-friendly, and built for everyday development.
Fast, private browser tools for JSON, timestamps, identifiers, encoding and everyday developer work.
Format data, inspect values and make quick conversions. Each tool runs in your browser, with no account and no upload step. Format, validate or minify JSON in your browser, with readable syntax errors and configurable indentation. Compare two JSON documents by structure and see added, removed and changed values at exact paths. Convert arrays of JSON records to RFC-style CSV, or turn a header-based CSV file into JSON objects. Convert Unix seconds, milliseconds, microseconds or nanoseconds to UTC, and convert ISO dates back to exact epoch units. Build and validate five-field cron expressions, explain each field and calculate upcoming runs in local time or UTC. Decode a three-part JWT header…from toolsfordev.tools
Does the same job
all alternatives →
Code Tools Studio10d ago · codetoolsstudio.com · ▲219 privacy-first tools for everyday developer tasks
More dev tools this month
the category →
Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com