Turn JSON files into HTML
Turn your JSON records into an HTML you can actually read and hand to someone. JSON is how apps and websites pass data around. Your file never leaves your computer.
How to convert JSON to HTML
- 1 Drop your JSON .json file onto the page, or click to browse for it.
- 2 Check the options. Nothing is thrown away on the way to HTML, so there is no quality dial to set.
- 3 Convert. The work happens on your own machine, so how long it takes depends on your computer and the file.
- 4 Download the HTML, or add more files and do the whole set in one go.
Why convert JSON to HTML
- Renders in every browser with no plugin, viewer or conversion.
- Reflows to any screen size, which fixed-layout formats cannot do.
- Exported reports and dashboards meant to be opened in a browser.
- JSON: verbose compared to binary formats, with keys repeated on every record.
JSON compared with HTML
How the two formats differ on the things that decide whether a conversion is worth making.
| Property | JSON | HTML |
|---|---|---|
| File extension | .json | .html |
| Colour depth | UTF-8 text, six value types, no comments or trailing commas | UTF-8 markup rendered through the CSS box model |
| Introduced | 2001 | 1993 |
| Developed by | Douglas Crockford | Tim Berners-Lee, now WHATWG |
Quality and what changes
Both sides are lossless, so every pixel survives the trip intact and converting back returns the same image. What changes is the size and what the file can carry: HTML stores the data without compression, so expect a much larger file.
- One HTML limitation to keep in mind: appearance depends on CSS, fonts and the browser, so it is not fixed layout.
Questions about JSON to HTML
Is my JSON file uploaded anywhere?
No. The whole thing runs inside the browser tab you already have open. Your JSON is read straight from your own disk, converted on your machine and handed back as an HTML. Nothing is sent anywhere, nothing is stored and there is no account.
Is there a file size limit?
There is no server-side limit because no server sees the file. The real ceiling is your device memory, since the input and the output both have to fit in the tab. A few hundred megabytes is usually fine on a desktop machine and considerably less on a phone.
Can I convert several JSON files at once?
Yes. Add as many as you like and they are processed one after another, then offered as separate HTML downloads or as a single ZIP. Speed depends on your own processor rather than on a queue.
Does the converter work offline?
Yes, after the page has loaded once. The engine is cached by the browser, so you can disconnect, reload and keep converting. That falls out of doing the work locally rather than being a separate mode you switch on.