
DuskTools.app
DevToys
SmallDevTools
CodeTray.dev
CodeUtil.dev
DevsBox
CyberChef
19 free browser-based developer tools — no signup, no tracking, everything runs client-side.

Grammarly
ProWritingAid
Wordtune
Ginger
Editsaurus
Wordvice AI
Grammarian PRO3
Free proofreading tool for OpenOffice, LibreOffice, Firefox, and Chrome.

Which is more popular?
Based on our record, LanguageTool seems to be more popular. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | devtoolkit.site | languagetool.org |
| Pricing | — | |
| Platforms | — | |
| Company | 1 - 9 employees · 2026 | — |
| 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...
No description of LanguageTool yet.
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
No DevToolKit.site videos yet. You could help us improve this page by suggesting one.
LanguageTool: free and open-source grammar checker
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 LanguageTool.
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.
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 — 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 — 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.
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 — 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.
Share your experience with using DevToolKit.site and LanguageTool. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


We have no reviews of DevToolKit.site yet. Be the first one to post
G2 Ratings: A wrote on G2, expressing their love for LanguageTool. They said they love it because it is an open-source style and grammar checker. Also, they loved how LanguageTool supports many languages.
LanguageTool has a free version that brings a reliable error checker and informs you regarding basic typos errors. The tool also has a premium version, which is packed with features. The Premium version starts at...
LanguageTool is an alternative to both Grammarly and ProWritingAid. It checks and corrects most of the writing mistakes such as grammar and spelling. It supports more than 25 languages. If you use Google Docs, there...
Recommendations tracked on public social media and blogs since March 2021.


Tracking DevToolKit.site since Feb 2026.
You could check for spelling mistakes first with something like https://languagetool.org/de. Source: almost 4 years ago
I prefer https://www.deepl.com/ and https://languagetool.org/de might be also helpful. Source: almost 4 years ago
I was already used to wiggly lines in my favorite IDE IntelliJ and really missed the spell and grammar check capabilities in other editors especially when writing something in the browser. A colleague told me that IntelliJ is using... - Source: dev.to / over 4 years ago
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