Free TOML Converter: No Sign-up, Files Never Uploaded
Convert TOML files free, right in your browser. There is no sign-up or login, no watermark, and nothing is uploaded: your data files never leave your device.
TOML in short. Tom’s Obvious Minimal Language: INI-like configuration with real data types. Used by Cargo and Python’s pyproject.toml.
From TOML you can convert to JSON, YAML, XML, INI, ENV and PROPERTIES, and 1 more formats. These pairs run on code already in the page, with no extra engine to download.
- Free
- No sign-up
- Never uploaded
- No watermark
Your files are converted on your device and never uploaded.
How to convert
- Add your TOML files by dragging them onto the converter or by using the file picker.
- Choose the format you want from the list of targets that fit your file.
- Open the options if you want to change quality or size, or keep the defaults.
- Press Convert and watch the progress shown for each file.
- Download each result, or take them all together as one ZIP when you converted several files.
Features
- Reads .toml files and can also write them.
- Free, with no watermark added to the result.
- No sign-up and no login.
- Your files are never uploaded and never leave your device.
- Batch conversion with a ZIP download for several results.
- The input is recognised by its content, not only by its file name.
- 7 target formats to choose from.
Supported formats
| Format | Read | Write | Notes |
|---|---|---|---|
| CSV.csv | Yes | Yes | Comma-separated values: one row per line, plain text with no formatting. |
| TSV.tsv | Yes | Yes | Tab-separated values: like CSV but split on tabs. |
| JSON.json | Yes | Yes | JavaScript Object Notation: the usual format for web APIs. |
| JSON Lines.jsonl | Yes | Yes | One JSON value per line, so very large files can be read one record at a time. |
| JSON5.json5 | Yes | No | JSON5 is read only here; convert it to JSON or YAML. |
| YAML.yaml | Yes | Yes | Indentation-based data format that is easy for people to read. |
| Property list (PLIST).plist | Yes | Yes | Apple’s property list: settings stored as XML dictionaries. |
| XML.xml | Yes | Yes | Extensible Markup Language: tagged, self-describing text defined by the W3C. |
| TOML.toml | Yes | Yes | Tom’s Obvious Minimal Language: INI-like configuration with real data types. |
| INI.ini | Yes | Yes | Simple sections of key=value lines, from early Windows configuration. |
| dotenv (ENV).env | Yes | Yes | KEY=value lines loaded as environment variables by many tools. |
| Java properties.properties | Yes | Yes | Key-value configuration files used by Java applications. |
| Hjson.hjson | Yes | No | Hjson is read only here; convert it to JSON or YAML. |
| Markdown table.md | No | Yes | A table written with pipes and dashes, rendered by GitHub and most Markdown tools. |
| SQL INSERT.sql | No | Yes | A script of INSERT statements that loads the rows into a database table. |
About the formats
About TOML
Tom’s Obvious Minimal Language: INI-like configuration with real data types.
Used by Cargo and Python’s pyproject.toml.
It does not support transparency.
What TOML can become
TOML to JSON runs in the page.
TOML to YAML runs in the page.
TOML to XML runs in the page.
TOML to INI runs in the page.
TOML to ENV runs in the page.
TOML to PROPERTIES runs in the page.
TOML to PLIST runs in the page.
Converting to TOML
Pages for converting to TOML start from JSON and YAML.
Privacy: how it works
- Your TOML files stay on your device. The page reads each file with the browser's file API, converts it with code running in the tab, and hands the result back as a download. No upload happens, so there is no copy of your file on our servers to protect, delete or leak.
- There is nothing to sign up for and no login. The converter does not ask for an email address, and it does not need to know who you are to do its job.
- You can check the claim yourself: open your browser developer tools, watch the Network tab while a file converts, and you will see no request that carries your file.
Tips
- Keep the original file; comments and key order are not always preserved between formats.
- Lists of records with the same fields convert most cleanly to tables.
- Validate the output with the tool that will read it.
- Check numbers and booleans in the result, since some formats store everything as text.
Frequently asked questions
Is it really free?
Yes. There is no price, no trial, no credit card and no watermark added to your results. Ulkaa Tool does the conversion with your own device, so there is no server bill to pass on to you.
Are my files uploaded?
No. Your TOML files are read and converted inside your browser and are never sent to Ulkaa or to anyone else. The result is created on your device and you save it from there.
Do I need an account?
No. There is no sign-up and no login. Open the page, add your files and convert. An Ulkaa account is not needed for anything on this tool.
Is there a file size limit?
No limit is set by us. The real limit is your device: the conversion uses your own memory and processor, so very large files can be slow, and a very big batch may need to be split into smaller runs.
What can I convert TOML files to?
You can convert TOML to JSON, YAML, XML, INI, ENV, PROPERTIES and PLIST. Pick one on the converter and it applies to every file you add.
Can I convert other files to TOML?
Yes. JSON and YAML can be converted to TOML.
Can I convert many TOML files at once?
Yes. Add as many files as your device can handle. Each one is converted on its own and you can download them one by one or as a single ZIP.