Render any .xlsx workbook to an image, on demand.
POST a spreadsheet and receive a clean PNG render of your workbook. The renderer handles grid lines, column widths, number formats, fills, borders and common spreadsheet layouts through a simple HTTP API.
Free plan included · EU-hosted infrastructure · Built in public, improving quickly
Illustrative example of API output.
Capabilities
Focused on accurate spreadsheet previews
A straightforward API for turning workbooks into images without running Office yourself.
Close to the source
Cell formats, borders, merged ranges, column widths, number formats and conditional formatting are reproduced from the workbook itself.
Workbook or sheet output
Render a whole workbook, a single sheet, or a selected range. PNG is the primary output format today.
Built for real .xlsx files
The renderer reads workbook structure and common formulas before rendering, rather than generating a generic file thumbnail.
Practical data handling
Files are processed on EU-hosted infrastructure. Clearer retention controls and deletion tools are part of the near-term work.
Honest performance
Typical workbooks render quickly, but complex sheets can take longer. We prefer visible limits and measured behavior over vague uptime claims.
API first
The core render API is live. Dashboard history, higher-resolution output and billing are being added step by step.
How it works
A single endpoint. Predictable output.
1. Submit
Send the workbook over HTTPS as a multipart upload. File-size limits scale with your plan.
2. Render
The engine opens the workbook, evaluates formulas and produces an image of each sheet at the requested resolution.
3. Deliver
Receive signed image URLs or inline payloads. Outputs are short-lived by default and can be set to zero retention.
POST https://api.spreadsheetpreview.com/v1/render
Authorization: Bearer <api_key>
Content-Type: multipart/form-data
file=@FY2025-Revenue.xlsx
format=png
sheets=all
dpi=2
— 200 OK
{
"id": "rdr_8fJ2k…",
"sheets": [
{ "name": "Revenue", "url": "…/revenue.png", "width": 1480, "height": 920 },
{ "name": "Costs", "url": "…/costs.png", "width": 1480, "height": 640 },
{ "name": "Forecast", "url": "…/forecast.png", "width": 1480, "height": 1100 }
],
"ms": 612
}Security & data handling
Honest about what is in place today.
Workbooks often contain sensitive data. The product is early, so we describe current safeguards plainly and avoid claiming certifications we do not have.
EU-hosted
The service currently runs on EU-hosted infrastructure.
Limited retention
Uploaded files and outputs are kept only as needed for processing, delivery and dashboard history while retention controls mature.
Clear boundaries
We do not sell uploaded spreadsheet contents. Billing, infrastructure and authentication providers are used to operate the service.
No formal certifications yet
Formal SOC 2, ISO 27001, SSO and audit-log exports are not available today. We will say clearly when that changes.
Pricing
Simple monthly pricing
Start free, then upgrade when your render volume grows. Annual plans get 2 months free.
Free
A real account for trying the API with your own workbooks.
Included for every account
Start free- 25 renders / month
- PNG output
- 10MB uploads
- Watermarked output
- No card required
Starter
Small production usage for a single product or internal tool.
Or €190 / year
Start Starter- 500 renders / month
- PNG output
- Higher resolution rendering
- 25MB uploads
- Community support
Growth
Production workloads with more volume and larger files.
Or €790 / year
Start Growth- 5,000 renders / month
- PNG output
- 50MB uploads
- EU processing
- Email support
Scale
High volume teams that need a direct line in.
Or €2,490 / year
Start Scale- 25,000 renders / month
- 100MB uploads
- Higher-volume API usage
- Priority support
- Input on product roadmap
Let's talk
Need more volume, a specific retention setup, or a workbook that needs careful fidelity testing? We can discuss what is realistic today.
All prices exclude VAT. Additional usage and custom limits are available on request.
FAQ
Frequently asked
Evaluate the platform with your own workbooks.
Start with the free plan, create an API key, and test the renderer against files that represent your real workload.