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 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.

Not live yet. The playground goes live with the M2 launch — meanwhile, read a sample report below. Want the engine on your own machines the day it ships? Start a 30-day trial.
report.json · quarterly-close.xlsx · 312 features detected compat-report.v1
FeatureStatusCodeDetail
Number formats41 distinct formats, including accounting and customSUPPORTED—Rendered to Excel display strings with locale pinned.
Conditional formatting3 rules using cached valuesSUPPORTED—Data bars and colour scales painted from cached evaluation.
SmartArt diagramsOrg chart and process diagramSUPPORTED—Shapes, connectors, labels, and theme styling rendered faithfully.
Interactive slicer controlsPivotTable filter, sheet “Dashboard”PARTIALW5104Current selection rendered; live filtering has no static PDF equivalent.
External workbook links2 referencesSKIPPEDW1011Cached values rendered; live refresh would require network access.
Legacy VML 3-D extrusionDecorative effect on archived worksheetUNSUPPORTEDW6208Obsolete decorative effect omitted; worksheet content is unaffected.
Exit code 2Converted — unsupported content reported. Your pipeline decides what is acceptable.
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.