About this site
dsjson.com is a free online toolbox with 60+ tools for images, PDFs, text and code. This page explains who runs it, how your data is handled, and why it is built this way.
1. What this is
- 60+ tools grouped into developer utilities, encoding, encryption, code formatting, text, images, PDF, network, webmaster and online execution.
- No sign-up, no install, no download: open a page and use it. Tools that run locally have no daily task limit or file size cap.
- Chinese and English: every tool has both language versions, and you can switch at any time.
2. Who maintains it
- The site is built and maintained by a small independent team (one engineer at the core). There is no parent company and no investors; the tools, the articles and the pages are all maintained by the same people.
- What we say a tool does is based on what the code actually does - if a feature is not implemented, it is not described.
- Contact: support@dsjson.com (or the feedback page).
3. How your data is handled
We describe this by where the work actually runs, instead of the convenient claim that everything is local:
- (a) In your browser - most tools: JSON format/validate, encoding conversion, MD5/SHA hashing, AES encryption, text counting, base conversion, image compression and conversion, image to PDF, PDF merge and split. Your input never leaves your device and these work offline.
- (b) Networked third-party services: DNS lookup, WHOIS, HTTP/WebSocket testing and webpage screenshots have to send the domain or URL you type to the corresponding public service.
- (c) Cloud execution: Java, Go, C++ and Shell runners send your code to a third-party compile service (Wandbox) and return the output - do not paste sensitive code there. Python and JavaScript run inside your browser (Pyodide / native JS), so the code never leaves your device.
- Analytics: anonymous page views only, never the content you type into a tool.
See the Privacy Policy for details.
4. Why it is free
- There is no paid tier, subscription, in-app purchase or donation button; every tool is free (see the Terms of Service).
- Server and domain costs are covered by a small number of promotional placements on the pages. Promotions are unrelated to tool output, never affect a calculation, and are not part of any tool's processing path.
- If any channel asks you to pay in order to use this site, that is not us - please do not pay and let us know at the address above.
5. How the content is written
- Tool descriptions and articles are based on official documentation and our own testing. We state concrete specs (formats, widths, ranges, algorithm versions) instead of unverifiable adjectives.
- The FAQ on each tool page answers technical questions only. Where we are not certain, we leave it out - for example, we state plainly that MD5 is a one-way hash and cannot be decrypted.
- Tell us when something is wrong: send it through the feedback page. We verify first, then correct the page and record the change in the changelog.
6. What we do not do
- No registration or login, and no collection of your name, phone number or other identity data.
- No watermarks on tool output, and no file size or usage caps on tools that run locally.
- We do not use what you type into a tool for training, profiling or resale.
- We do not stuff keywords for search engines; every sentence on a page has to be useful to a reader.