Turn SMI subtitles into JSON. It is converted in your browser, so the file never leaves your device.
Drop SMI files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop SMI (SAMI) files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the JSON, or download everything as one ZIP if you converted several files.
The SMI to JSON converter is part of this page and runs inside your browser. Your subtitles are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
SMI is HTML-like and many players outside Windows and Korea do not read it. JSON is what APIs and most programming languages read natively. SMI is at home in subtitles for Korean-market players and multilingual files; JSON is the usual choice for APIs and data exchanged between programs.
The text is read as UTF-8 or UTF-16, whichever the file is. An older file in another code page is read using the charset it declares, or as Windows-1252 if it declares none, so accented letters in an unlabelled legacy file can come out wrong. A file that is not text, such as the picture-based subtitles of a DVD, is refused instead of being converted to nonsense. A SAMI file can hold several languages; only the first one found is read. The result is a JSON list with one object per cue: its number, start and end as clock times and in milliseconds, and its text.
SAMI is an HTML-like subtitle format from Microsoft, with each cue a SYNC tag holding the start time in milliseconds. It can hold several languages in one file, selected by style class. It is most common in South Korea.
Opens in Windows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players
SMI converterJSON represents data as nested objects and lists in plain text. It is the default language of web APIs. Unlike a spreadsheet it can be nested to any depth, which is also why turning it into rows and columns takes a decision about how to flatten it.
Opens in Any text editor, every programming language, browser developer tools
JSON converter| SMISAMI subtitles | JSONJSON data | |
|---|---|---|
| Stands for | Synchronized Accessible Media Interchange | JavaScript Object Notation |
| Type | Subtitles | Structured data (text) |
| Compression | None | None |
| Introduced | The late 1990s, by Microsoft | 2001, by Douglas Crockford |
| Opens in | Windows Media Player, KMPlayer, PotPlayer, VLC and Korean-market players | Any text editor, every programming language, browser developer tools |
| Best for | Subtitles for Korean-market players and multilingual files | APIs and data exchanged between programs |
| File extension | .smi, .sami | .json |
No. The SMI to JSON conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The content is carried over as faithfully as JSON allows; features that JSON does not have are left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the SMI file, press Convert and save the JSON. There is nothing to install.
Yes, but a subtitle file is small. Files up to 50 MB are accepted, far more than any real subtitle file. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.