Text & Data Conversions Without Uploading
CSV, JSON, YAML, XML and Markdown — converted privately, right in your browser.
Text and data files are different from photos: they often contain customer lists, configuration with secrets, contracts or personal notes. That is exactly the kind of file you should not be pasting into a website that uploads it to a server. This guide covers the most common text and data conversions — and how to do them without uploading anything.
The most common text and data conversions
- CSV ↔ JSON — the two ways to move tabular data between spreadsheets, apps and APIs.
- JSON ↔ YAML — APIs and apps speak JSON; Docker, Kubernetes and CI configs speak YAML.
- XML ↔ JSON — modernising legacy/SOAP data for REST-style systems.
- Markdown → HTML / PDF — publishing READMEs, docs and get-started guides.
- TXT → PDF — turning plain text into a shareable, printable document.
- DOCX / RTF → TXT — stripping formatting to get clean plain text.
- Encoding fixes — repairing garbled characters (mojibake) between UTF-8, ANSI and Latin-1.
You can find all of them in the Text & Data Tools hub.
CSV and JSON
Developers need JSON for apps and APIs; analysts want CSV for spreadsheets. Converting both ways is one of the most frequent tasks. With the CSV to JSON converter you can switch direction, pick the delimiter (comma, semicolon, tab or pipe) and treat the first row as a header.
JSON, YAML and XML
JSON is compact but strict; YAML is friendlier for people and dominates configuration files; XML still runs a lot of enterprise infrastructure. The JSON to YAML converter and the XML to JSON converter translate between these formats, with attributes mapped to @_-prefixed keys and text to #text.
Markdown and PDF
Markdown is the default for READMEs, documentation and notes. You can turn it into clean HTML with the Markdown to HTML converter (sanitized, so scripts are stripped) or into a PDF with the Markdown to PDF converter. For plain notes, the text to PDF converter does the job.
Fixing garbled text (mojibake)
Text like ä or ’ is a classic encoding mismatch: a file saved in one character set is being read as another. The text encoding converter reads the file with the correct source encoding and writes it back as UTF-8, ANSI/Windows-1252 or Latin-1 — ideal for fixing CSV exports from legacy software.
Why doing this locally matters
Online converters usually upload your file first, process it on a server and send it back. For a public image that is fine; for a data export with customer records it is a risk. Because every FormatFlash tool runs in your browser, there is no upload request to trust — you can even watch the network tab and see none. For the same reason, these tools are useful for confidential documents and offline work.
Frequently asked questions
Can I convert text and data files without uploading them?
Yes. Every conversion runs locally in your browser, so your files and data never leave your device.
Which formats are supported?
CSV, JSON, YAML, XML, Markdown, plain text, RTF and DOCX, with PDF and XLSX output.
How do I fix garbled text?
Use the text encoding converter to re-encode the file, for example from Windows-1252 to UTF-8.
Is it really free?
Yes, all tools are free with no registration, no watermark and no limits.
Conclusion
Text and data conversions do not need a server. Pick the tool you need in the Text & Data Tools hub and convert privately in your browser.