
CyberChef
IT Tools
10015.io
JSONFormatter.org
CodeSwissKnife
A.Tools
JSONLint
A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.

Aptdot Developer Utilities
iLovePDF
JSONFormatter.org
10015.io
JSONLint
Convertio
CyberChef
A privacy-first suite of 100% local-browser utilities. Format JSON, decode JWTs, hash strings, generate passwords, edit PDFs, and more — without uploading a single byte. Free, no cookies.

Which is more popular?
Based on our record, DevToys seems to be more popular. It has been mentioned 16 times since March 2021.
Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | devtoys.app | offlineutils.com |
| Pricing | ||
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of DevToys yet.
OfflineUtils: The Privacy-First Developer Toolkit Stop pasting sensitive data into ad-filled, untrusted websites. OfflineUtils is a completely free, privacy-centric suite of 70 and growing essential utility tools designed for developers, creators, and students. Built with security in mind, every...
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.
DevToys - Review and How to Install | The Swiss Army Knife for Developers
More videos
OfflineUtils Demo (Extract Text from PDF)
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DevToys and OfflineUtils.
OfflineUtils's answer:
offlineutils.com is a completely offline-first, client-side suite of developer utilities and document tools. Unlike traditional web tools, it is built entirely without backend servers, ads, or tracking scripts. Every tool—from the JWT decoder to the PDF manipulators—executes locally right within the user's browser. Once the website is initially loaded, it can function entirely without an internet connection, ensuring a seamless, zero-latency experience that fundamentally respects user privacy.
OfflineUtils's answer:
Most online utility sites pose a silent security risk: when you paste sensitive data like API keys or upload confidential PDFs (such as financial records, legal documents, or invoices) to merge or format them, that data is sent to a remote server. offlineutils.com eliminates this risk entirely. Users should choose it because it guarantees 100% data privacy through local processing. Additionally, it offers a clean, distraction-free interface devoid of the intrusive ads, paywalls, and tracking cookies that plague competitor sites.
OfflineUtils's answer:
Because of its broad toolset, our audience is split into two primary camps who share a need for strict privacy:
Technical Professionals: Software developers, engineers, system administrators, and cybersecurity professionals who need to format data, test code, or generate hashes securely.
Business & General Users: Legal teams, financial professionals, students, and office administrators who frequently need to manipulate, merge, or edit PDF documents without violating company data policies or risking sensitive information.
OfflineUtils's answer:
offlineutils.com was built out of sheer paranoia by a Computer Science student who was constantly frustrated by pasting sensitive strings, JWTs, JSONs, PDFs into random utility sites plastered with ads. With zero transparency about what those sites were logging on their backends, they decided to build a secure, trusted "Swiss Army knife" platform to solve their own problem (and pad their resume for upcoming internships). Built with transparency at its core, the project remains completely open about its lightweight setup, prioritizing a privacy-first, serverless approach to web utilities.
OfflineUtils's answer:
Because offlineutils.com is built on a strict zero-tracking, privacy-first philosophy, we do not monitor, log, or harvest the data of our users. However, based on our toolset and community feedback, our primary user base consists of:
OfflineUtils's answer:
offlineutils.com is built on a highly optimized, modern web stack hosted on Vercel. The core application runs on Next.js 16 (utilizing the App Router) alongside React 19 and the React Compiler. Crucially, all tool functionality—from cryptographic hashing to media access—relies entirely on native browser Web APIs, ensuring zero reliance on external services.
Share your experience with using DevToys and OfflineUtils. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


There are lots of these, but this is the first that I've seen that focused on frontend dev a bit more. I've saved it to my list of tools for reference. Here's another with a more local / backend / IT flavor: https://it-tools.tech I have... - Source: Hacker News / 9 months ago
Think of DevToys as the developer equivalent of a multi-tool. It’s a desktop app with dozens of handy utilities. - Source: dev.to / about 1 year ago
Devtoys is great and open-source and .NET and cross-platform * https://devtoys.app/ and in context to the thread files-community/files is great and open-source and .NET and cross-platform * https://files.community/. - Source: Hacker News / over 1 year ago
Tracking OfflineUtils since Jun 2026.
When comparing DevToys and OfflineUtils, you can also consider the following products.


Zero-upload, client-side developer utilities for formatting, validating, and converting JSON payloads locally.
Compare Aptdot Developer Utilities to DevToys or OfflineUtils:

IT Tools is a free and open-source collection of handy online tools for developers & people working in IT.
Compare IT Tools to DevToys or OfflineUtils:


10015.io is an all-in-one toolbox offering many tools from various categories.
Compare 10015.io to DevToys or OfflineUtils:

Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
Compare JSONFormatter.org to DevToys or OfflineUtils: