Spreadsheet rendering SDK · self-hosted CLI, Docker, and .NET no Office · no LibreOffice · BUSL-1.1

01Playground · the shipping engine, watermarked

Upload a workbook.
Get the truth.

The playground runs the same Rendlio Sheets engine we ship, in evaluation (watermark) mode, on our servers. You get the watermarked PDF and the full compatibility report — ungated: every feature, every warning code, nothing held back. No account, no email. Files are deleted within one hour.

02Convert · watermarked PDF + full report

One upload. Zero commitment.

Workbooks up to 10 MB, .xlsx or .xlsm. Prefer not to send cell contents at all? Tick diagnose-only and the engine analyses structure without rendering anything.

Choose a workbook or drag it here .xlsx or .xlsm · up to 10 MB · converted with the shipping engine in watermark mode

Diagnose only (privacy mode). The report is produced from workbook structure alone — no cell content is ever rendered or stored, and you get the compatibility report instead of a PDF. I voluntarily donate the uploaded file to Rendlio Sheets' private, confidential test corpus, to be used solely to improve rendering fidelity, never published, and deleted at any time on request to privacy@rendlio.com (optional — conversion works the same without ticking). What does this mean? draft · counsel review pending

Donating a file to the Rendlio Sheets test corpus

If you tick the box, you donate a copy of the file you uploaded to the Rendlio Sheets test corpus.

The corpus is a private, access-restricted collection held by the Purpose Source Association, [seat address], Switzerland ("we").

We use donated files for one purpose only: testing and improving Rendlio Sheets' rendering fidelity.

Donated files stay confidential — they are never published; access is limited to the development team and to the infrastructure providers that store the corpus for us and process it only on our instructions.

We keep donated files until you ask us to delete them: email privacy@rendlio.com with the file name and approximate upload date, and we will delete the file and confirm.

Anonymised test artifacts derived from a donated file (such as expected-output baselines) may be retained after the file itself is deleted.

Donating is voluntary; the converter works exactly the same if you leave the box unticked.

Please do not donate files containing other people's personal data unless you are entitled to share them.

Full privacy policy: rendlio.com/privacy.

Waiting for the human check above — it enables the button. By uploading you accept the playground terms · files and results are deleted within one hour.

RetentionOne hour, then gone

Uploads and results are deleted within 60 minutes — an expired job looks identical to one that never existed.

TrainingNever used for training

Your file improves nothing unless you explicitly donate it — the corpus checkbox is off by default.

On completionScratch space wiped

Each conversion runs in an isolated worker; its temporary files are deleted the moment the job finishes.

Privacy modeDiagnose only

Structure-only analysis — no cell content rendered or stored, and the report is still the full report.