Convert HTML to JSON
Convert HTML files to JSON locally, completely free and with maximum privacy.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
Upload FilesPlatform Statistics
How to convert HTML to JSON
- Drop your .html files above, or click Upload Files. You can add many files at once.
- JSON is already selected as the output. Open the settings (gear icon) to fine-tune the result.
- Click Convert All. SheetJS runs inside your browser through WebAssembly; nothing is uploaded.
- Download your .json files as soon as each one finishes.
What to know about HTML to JSON conversion
- JSON is best for APIs, JavaScript apps and data pipelines, and opens in code editors, browsers and every programming language.
HTML vs JSON
| Feature | HTML (HTML Table) | JSON (JSON Table) |
|---|---|---|
| Multiple sheets | No | No |
| Formulas and formatting | No | No |
| Best for | publishing tables on web pages and in emails | APIs, JavaScript apps and data pipelines |
| Opens in | every browser and email client | code editors, browsers and every programming language |
HTML (HTML Table): Tabular data as an HTML table, ready to embed in web pages or emails.
JSON (JSON Table): Tabular data as a JSON array of row objects, ideal for APIs and JavaScript applications.
Conversion options
- Active sheet only or all sheets
- Custom output file name
Frequently asked questions
Is it safe to convert HTML to JSON here?
Yes. Your files are processed entirely on your own device by WebAssembly code running in the browser. They are never uploaded, so nobody else can see them, and the converter keeps working even if your connection drops after the page loads.
Is there a file size limit?
There is no server-side limit. The only limit is the memory available to your browser, typically 1.5–4 GB on desktop computers.
Can I convert several HTML files at once?
Yes. Add as many files as you like; they are converted in parallel according to your device's CPU cores, and you can apply the same settings to all of them.
Related conversions
Need the opposite? Convert JSON to HTML.
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