How do I convert TSV to JSON?

Add your TSV file to the upload area above, then press Convert. The JSON file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to JSON reduce quality?

No. JSON is a lossless format, so the conversion preserves exactly what is in your TSV file. Note that it cannot recover detail that was already discarded when the TSV was first created — a lossless container does not undo earlier compression.

How large a file can I convert?

Up to 100 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

SpreadsheetLosslessRuns in your browser

TSV to JSON Converter

Turn TSV files into JSON in a couple of clicks. Like CSV but tab-delimited — safer for text with commas. The default data interchange format for APIs. The conversion is lossless — every pixel, sample or byte in the source is preserved.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

TSV files (.tsv, .tab) · up to 100 MB each

or paste files from your clipboard

Ready when you are

Drop a TSV file above and FileTools360 will turn it into JSON — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your TSV files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
The defaults suit most people. Open Advanced to control delimiter and header handling and indentation and element names.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

TSV and JSON explained

TSV is CSV with tab characters as separators. Because tabs almost never appear inside data fields, it sidesteps most of CSV's quoting problems.

JSON represents structured data as nested objects and arrays. It came from JavaScript but is now the default interchange format for essentially every web API.

Where TSV files come from: Bioinformatics, data pipelines and anywhere fields contain commas.
Where JSON is used: APIs, configuration files and application data exports.

TSV vs JSON

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

TSV compared with JSON
Property	Source	Target
Compression	None	None
Introduced	—	2001
Browser support	Wide, especially in data tooling.	Every modern language and tool.

TSV is stronger at: No ambiguity with commas inside values. Simpler parsing than CSV. Common in scientific data.
JSON is stronger at: Native support in every modern language. Handles arbitrary nesting. Distinguishes strings, numbers, booleans and null.

Why convert TSV to JSON?

People make this switch when they run into the limits of TSV: handing files to non-technical recipients. JSON is the better fit when APIs, configuration and any data with structure beyond a flat table.

TSV limitations that prompt the switch: Tabs are invisible, making manual editing error-prone. Less universally recognised than CSV.
What you give up: No comments allowed. Verbose for large tabular datasets.

What is preserved when converting TSV to JSON?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.