
DuskTools.app
DevToys
JSONLint
CyberChef
regular expressions 101
DevsBox
FreeFormatter
19 free browser-based developer tools — no signup, no tracking, everything runs client-side.

devtoolz.dev
CodeKitHub
CyberChef
CodeSwissKnife
IT Tools
DeveloperToolBox.tech
TinyWow
Free online web utilities and developer tools with no sign-up or login required.

Which is more popular?
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | devtoolkit.site | etoolking.com |
| Pricing | ||
| Platforms | — | |
| Company | 1 - 9 employees · 2026 | 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


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...
eToolKing is a blazingly fast, privacy-focused collection of browser-based online tools designed for developers, creators, and everyday web users.Key Features 100% Free & No Sign-up: Zero friction, no registration, or installation required. Privacy-First: All calculations and data processing...
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of eToolKing yet.
Walkthroughs and reviews on video.
No DevToolKit.site videos yet. You could help us improve this page by suggesting one.
Online Alarm Clock: Big online alarm clock with great alarm tone options, full-screen, and dark mode
More videos
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DevToolKit.site and eToolKing.
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 — each with a clean, focused UI for a single task. Unlike DevToys, it works on any device with a browser — 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 — no data is ever sent to a server, which matters if you're working with production JWTs, API keys, or database configs.
eToolKing's answer:
Choosing eToolKing means getting 100% free access to essential developer tools, formatters, and converters without privacy compromises or hidden fees.
Key advantages include:
Complete Privacy: All calculations and transformations run client-side.
Zero Friction: No registration and no daily usage limits.
Modern PWA Architecture: Works smoothly across desktop and mobile devices with fast loading times.
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.
eToolKing's answer:
The primary audience includes software developers, web designers, IT professionals, data analysts, students, and digital nomads who need fast, secure, and reliable web utilities for daily tasks without logging into an account.
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 — 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.
eToolKing's answer:
eToolKing was created out of frustration with existing web utility sites that are bloated with aggressive ads, force user registrations for basic tasks, or leak sensitive client data to external servers. The goal was to build a clean, lightning-fast, and privacy-first tool hub that empowers developers and web users around the world.
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 — zero external crypto libraries. FileReader API for client-side Base64 file encoding. All tools are React components with no backend — 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.
eToolKing's answer:
Modern Web Standards, HTML5, CSS3, JavaScript, Progressive Web Apps (PWA), and AWS Infrastructure.
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.
eToolKing's answer:
Software Engineers & Full-Stack Developers
Web Designers & UI/UX Professionals
IT Support & System Administrators
Digital Marketers & Content Creators
Tech Students & Researchers
DevToolKit.site's answer
Three things set DevToolKit apart. First, it includes tools you won't find in other online toolkits — 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 — hashing runs through Web Crypto API with hardware acceleration, passwords use crypto.getRandomValues(), file encoding uses FileReader — 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 — no navigating through menus or loading tools you don't need.
eToolKing's answer:
eToolKing is a zero-friction, client-side online utility platform that requires absolutely no user sign-up or login. Unlike traditional web toolkits cluttered with paywalls and mandatory registrations, eToolKing prioritizes user privacy, instant accessibility, and speed by processing data directly within the user's browser.
Share your experience with using DevToolKit.site and eToolKing. For example, how are they different and which one is better?
When comparing DevToolKit.site and eToolKing, you can also consider the following products.

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
Compare DuskTools.app to DevToolKit.site or eToolKing:

DevToolbox is a free, no-signup collection of 148 client-side developer tools and 78 guides — a lightweight alternative to installing dozens of separate SaaS dev-tool apps.
Compare devtoolz.dev to DevToolKit.site or eToolKing:

A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.
Compare DevToys to DevToolKit.site or eToolKing:

Free online tools: JSON formatter, password generator, QR code maker, calculators, converters and more. Fast, private, no login — everything runs in your browser.
Compare CodeKitHub to DevToolKit.site or eToolKing:

JSON Lint is a web based validator and reformatter for JSON, a lightweight data-interchange format.
Compare JSONLint to DevToolKit.site or eToolKing:
