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DevToolKit is a collection of 19 free online developer tools that run entirely in the browser. No backend, no signup, no data ever leaves your machine. Built with Next.js 14 and Tailwind CSS. Tools include: JSON Formatter & Validator, JSON Tree Viewer with node path copying, YAML-JSON Converter, SQL Formatter, Base64 Encoder/Decoder (text + file drag & drop), URL Encoder, JWT Decoder, Hash Generator (SHA-1/256/384/512 via Web Crypto API), Password Generator, Cron Expression Parser with next run time calculation, PostgreSQL Config Generator (free PGTune alternative), UUID v4 Generator, QR Code Generator (PNG + SVG), Lorem Ipsum Generator, Regex Tester, Text Diff Checker, Unix Timestamp Converter, Color Converter (HEX/RGB/HSL), and HTTP Status Codes Reference. Every tool processes data locally using native browser APIs. No server-side processing, no cookies, no analytics tracking of input data.
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DevToolKit.site's answer:
DevToolKit runs 100% in the browser with zero signup. Unlike CyberChef, which has a steep learning curve with its recipe-based interface, DevToolKit gives you 19 standalone tools โ each with a clean, focused UI for a single task. Unlike DevToys, it works on any device with a browser โ no desktop app installation needed. And unlike SmallDevTools or similar online toolkits, DevToolKit includes unique tools like a PostgreSQL Config Generator (a free PGTune alternative), a Cron Expression Parser that calculates next 10 actual run times, and a JSON Tree Viewer with click-to-copy node paths. Every tool uses native browser APIs like Web Crypto for hashing โ no data is ever sent to a server, which matters if you're working with production JWTs, API keys, or database configs.
DevToolKit.site's answer:
Backend and full-stack developers who deal with JSON, JWTs, SQL, cron jobs, and PostgreSQL configuration on a daily basis. DevOps engineers who need quick encoding, hashing, or regex testing without installing CLI tools. Developers who care about data privacy and don't want to paste production tokens or API responses into random websites that may log input data.
DevToolKit.site's answer:
I'm a backend developer with 10+ years of experience in Python and Go, working on distributed systems and microservices. Every day I was jumping between 5-6 different sites to format JSON, decode a JWT, test a regex, or convert a timestamp โ each one bloated with ads, cookie banners, and signup walls. One evening I decided to build all the tools I actually use into a single place where everything runs client-side. The first version had 15 tools and took a weekend to build with Next.js and Tailwind CSS. After getting feedback, I added a PostgreSQL Config Generator (because PGTune hasn't been updated in years), a JSON Tree Viewer, and an HTTP Status Code Reference. It's now at 19 tools and growing based on what developers ask for.
DevToolKit.site's answer:
Next.js 14 with App Router for server-side rendering and per-page SEO metadata. Tailwind CSS for styling with a custom dark theme. Web Crypto API (crypto.subtle) for SHA-1/256/384/512 hashing and cryptographically secure password generation โ zero external crypto libraries. FileReader API for client-side Base64 file encoding. All tools are React components with no backend โ the entire app is static and deployed on Vercel. Each tool is a separate route with its own metadata, canonical URL, and sitemap entry for independent Google indexing.
DevToolKit.site's answer:
DevToolKit is a free tool with no accounts, so we don't track individual users. It's used by individual developers and small teams who need quick, private access to common dev utilities without enterprise overhead. The tool is designed for anyone who works with APIs, databases, or web development and wants a fast, ad-free, privacy-respecting alternative to existing online tools.
DevToolKit.site's answer:
Three things set DevToolKit apart. First, it includes tools you won't find in other online toolkits โ a PostgreSQL Config Generator that replaces PGTune with hardware-aware tuning calculations, a Cron Expression Parser that doesn't just describe the schedule but calculates the next 10 actual execution timestamps, and a JSON Tree Viewer where you click any node to copy its full JavaScript path like data.users[0].email. Second, every tool uses native browser APIs instead of external libraries โ hashing runs through Web Crypto API with hardware acceleration, passwords use crypto.getRandomValues(), file encoding uses FileReader โ meaning zero dependencies and zero data transmission. Third, each of the 19 tools lives on its own URL with dedicated SEO metadata, so you can bookmark devtoolkit.site/jwt-decoder/ and go straight to it โ no navigating through menus or loading tools you don't need.
The app helps keep everything organized and is really easy to use. Iโve been using it for a while now, and I really like it.
If you're someone who likes to keep everything in order and easily accessible, you'll want to check out the Evernote app. This app is designed to help you keep track of all your notes, ideas, and to-do lists in one place, and it does so with style.
From my experience using the app, I found that it's incredibly user-friendly and has a sleek design. You can easily create notes, organize them into notebooks, and even add tags to make it easier to find what you're looking for later on. Whether you're a student trying to keep track of your class notes or a busy professional juggling multiple projects, Evernote has you covered.
The thing that I personally like about Evernote is that before I have used word as my note taking application, than on my smartphone I have had used Google Keep and so my notes were just unorganized mess. But with Evernote now I can have my notes at one place and unified. Also the fact that I can log to another device and my notes are "just there" is really nice. And also I like graphics user interface of Evernote.
Based on our record, Evernote seems to be more popular. It has been mentiond 66 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Obsidian is a multi-platform note-taking and writing app. Simple enough. But aren't there plenty of those around? Yes absolutely, but they each have downsides that I wasn't able to settle with long-term. With Google Cloud it was the difficult of linking between notes (this has improved since but it's still not quite what I want). With Evernote my notes were in a proprietary format and stuck in the cloud. Notion... - Source: dev.to / over 1 year ago
Notion, Obsidian, or Evernote: Great for organizing notes with tags, links, and summaries. - Source: dev.to / over 1 year ago
Evernoteโs mobile website design maintains its brand style and color palette, featuring a clean and simple layout. The siteโs centered call-to-action, โSign up for free,โ clearly directs users toward conversion while emphasizing the appโs value without distraction. - Source: dev.to / almost 2 years ago
Evernote.com โ Tool for organizing information. Share your notes and work together with others. - Source: dev.to / over 2 years ago
Shottr: A tool for taking screenshots and sharing them with others. It offers more functionality than the native macOS tool and is much lighter than Skitch. - Source: dev.to / about 3 years ago
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
DuskTools.app - 150+ free browser-based developer tools - no sign-up, no tracking, no backend. JSON formatter, Base64 encoder, regex tester, JWT decoder, UUID generator, HTTP status lookup, MIME types, port reference, cron builder & more. Everything runs locally in
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
DevToys - A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
CodeUtil.dev - Fast, private developer tools in your browser. JSON formatter, Regex tester, Cron generator, and 17 more.