HTML → JSONL
Convert HTML files to JSONL entirely in your browser — no upload, no watermark, no sign-up.
Drop files here
or browse from your device
images · audio · video · documents · archives · up to ~500MB
Your first conversion lands here automatically — saved on this device only, never uploaded.
100% Private
Runs in your browser. No upload.
Instant
No queue, no server roundtrip.
Offline-ready
Works after first load.
Turning a HTML file into JSONL changes what you can do with the document: read it, edit it, sign it, print it or hand it to a system that insists on one format. JSONL (JSON Lines) earns its place here: append-friendly, streamable records for large datasets and ML pipelines. HTML is the language of web pages — structure and content marked up as tags, styled by CSS. It is perfect on screen and awkward the moment someone needs a fixed-page copy.
HTML is the language of web pages — structure and content marked up as tags, styled by CSS. It is perfect on screen and awkward the moment someone needs a fixed-page copy.
Text and structure move across from HTML to JSONL; how faithfully the layout follows depends on how much layout JSONL can express. Fixed-layout targets keep pagination exactly as it looks, while text-oriented targets keep the words and headings and let the reader reflow them. Fonts not embedded in the source are substituted.
What you gain with JSONL: Append-friendly, streamable records for large datasets and ML pipelines.
Drop your HTML file above and Morphio decodes it locally, then re-encodes it as JSONL using WebAssembly + the browser's native codecs. Nothing is ever uploaded — your files stay on your device. Batch as many files as your machine can handle. See exactly how in-browser conversion works.
Open the HTML to JSONL page, drop your document on the drop zone and press convert. Morphio runs local parsers such as pdf.js that execute in your own tab, so the HTML data never leaves your device and no server ever receives a copy.
Text and structure are read locally, so nothing is retyped, re-uploaded, or sent to an OCR service. Converting HTML to JSONL only rewrites the container and encoding you asked for — the source file on your disk is never modified.
Yes. The free plan covers 10 conversions a day with files up to 200 MB and adds no watermark or sign-up. Morphio Pro ($5/month, or $29 once for lifetime access) removes the daily cap and raises the per-file limit to 5 GB.
No. The content is remapped from HTML into JSONL structurally, so nothing is re-compressed. Only features JSONL has no way to express are left behind.
Yes — drop the whole batch in and each file is processed in turn on your own machine. The practical limit is your device's memory and patience, not a server quota, because nothing is queued anywhere else.
No. The conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can disconnect from the internet after the page loads and it still works.