Effective July 8, 2026
DevsToolHub ("we," "us," or "this site") is a free collection of browser-based developer utilities — JSON editing, diffing, format conversion, encoding, and related tools. This policy explains what data is and isn't collected when you use devstoolhub.com.
Every tool on this site — the JSON editor, diff viewers, converters, encoders, hashers, and the rest of the utility collection — runs entirely in your browser using JavaScript. Text, files, and images you paste or upload into a tool are processed locally on your device and are never uploaded to a server or seen by us. Closing the tab discards that data unless the tool explicitly saves it to your browser's local storage (see below).
The one exception is the API Tester, which sends requests directly from your browser to whatever URL you enter — that's the tool's purpose, and those requests go straight to the destination you specify, not through our servers.
Some tools — including the JSON Editor's history, the Why Layer's saved annotations, and the search modal's recent-searches list — save data to your browser's local storage so it persists between visits. This data stays on your device, is never transmitted anywhere, and can be cleared at any time by clearing your browser's site data for devstoolhub.com.
This site is supported by Google AdSense. Google and its partners use cookies and similar technologies to serve ads based on your prior visits to this and other websites. Google's use of advertising cookies enables it and its partners to serve ads based on your visits to this site and/or other sites on the Internet.
Your choice. The AdSense script is not loaded until you answer the cookie banner shown on your first visit, so no advertising cookies are set before you decide. Choosing "Accept" allows personalised ads. Choosing "Reject non-essential" loads advertising in non-personalised mode instead, where ads are based on the page you are reading rather than on a profile of your browsing. Your answer is stored in your browser's local storage and can be changed at any time using the Cookie settings link in the site footer.
You can opt out of personalized advertising by visiting Google Ads Settings, or opt out of a third-party vendor's use of cookies for personalized advertising by visiting www.aboutads.info. We do not control how Google or its advertising partners use these cookies — see Google's own Partner Sites policy for details.
The homepage displays a total-visits counter powered by a third-party API (counterapi.dev). This only increments an anonymous, site-wide count on page load — it does not identify individual visitors and isn't tied to any personal data.
The Contact page submits your name, email, and message directly to a third-party form-relay service (FormSubmit) which forwards it to the site owner's email inbox. That information is used solely to respond to your message and is not sold, shared, or used for marketing.
DevsToolHub does not require sign-up or login, does not run its own analytics or tracking scripts, and does not maintain user accounts or profiles. Aside from the items listed above, we do not collect or store personal information.
This site is not directed at children under 13, and we do not knowingly collect personal information from children.
This policy may be updated occasionally to reflect changes to the site's tools or advertising setup. The "Effective" date at the top of this page reflects the most recent revision.
Questions about this policy can be sent via the Contact page.