A private, free alternative to CloudConvert
Convert PDF to Word, Excel to CSV or JSON, images between JPG, PNG and WebP, Mermaid to PNG and speech to text, on your own device. No conversion minutes, no account and no upload.
Free forever · Runs on your device · 0 bytes uploaded
Fizzdoc vs CloudConvert
- How Fizzdoc handles your fileIt never leaves your device: every tool runs inside your browser tab, and the page is blocked from sending files anywhere. Free, with no account, no daily limit and no watermark.
- How CloudConvert handles itCloudConvert converts files on its servers; its privacy policy says uploaded files are deleted after 24 hours at the latest. Free use has a daily limit.
- When CloudConvert is the better choiceCloudConvert supports far more formats (video, e-books, CAD and many more) and offers an API for developers.
Based on CloudConvert’s public website, October 2026. Plans and limits change, so check their site for the latest. CloudConvert is a trademark of its owner; Fizzdoc is independent and not affiliated.
Fizzdoc tools for the jobs people use CloudConvert for
Each one works in your browser, free, without uploading anything.
- PDF to WordTurn PDF text into an editable .docx.
- Word to PDFConvert a .docx to PDF, all languages supported.
- Excel to CSVExport every sheet of an .xlsx to CSV.
- CSV to ExcelTurn a .csv into a proper .xlsx workbook.
- Excel to JSONTurn spreadsheet rows into clean JSON objects.
- JSON to ExcelTurn JSON into a spreadsheet with a header row.
- Convert ImageConvert between JPG, PNG and WebP.
- PDF to JPGSave every page as a sharp JPG image.
- JPG to PDFTurn photos and scans into one PDF.
- Mermaid to PNGSave a Mermaid diagram as a sharp PNG image.
- Audio to TextTurn speech in an audio or video file into text or subtitles.
- PDF to TextExtract all text from a PDF as a .txt file.
Private by design — and you can check
Your files are never uploaded, because there is nowhere to upload them to.
- No upload step existsFiles are read and written inside this browser tab. There is no server that could receive them.
- The browser enforces itThis page’s Content Security Policy only allows connections back to this site, which serves nothing but the app itself.
- See for yourselfOpen developer tools, watch the Network tab and run a job: no request carries your document.
- Open sourceEvery line is on GitHub, built on qpdf, pdf.js & pdf-lib.
Frequently asked questions
How can Fizzdoc work without uploading my file?
Every tool runs inside your browser tab, using engines compiled to WebAssembly. Your file is read from your device, processed there and saved back to it. The page is only allowed to talk to fizzdoc.com, which serves nothing but the website itself, and you can watch your browser’s Network tab to see that no file leaves.
Which conversions does Fizzdoc do?
PDF to and from Word, JPG and PNG, PDF to PowerPoint, text and Markdown, Excel to and from CSV and JSON, image format changes, Mermaid to PNG or SVG, and audio or video to text and subtitles.
Is Fizzdoc made by CloudConvert?
No. Fizzdoc is an independent, open-source project and is not affiliated with or endorsed by CloudConvert. CloudConvert is a trademark of its owner and is named here only to compare.
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