SDA to OTP Converter

Convert SDA to OTP online for free. Fast, secure, and high-quality conversion with no sign-up or software required.

Free to useNo file stored beyond 1 hourEncrypted over TLS 1.2/1.3No watermarks

or drag and drop files here

Maximum file size is 1GB

How it works

Three steps to your converted file

Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.

Upload your file

Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.

Choose an output format

Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.

Convert & download

Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.

What is an SDA file?

SDA is the legacy presentation file format used by StarOffice Impress and early versions of OpenOffice.org, the predecessor suites to today's LibreOffice Impress. It stores slides, layouts, and embedded media using StarOffice's original binary document model, which was later replaced by the OpenDocument Presentation (ODP) standard. SDA files are now mostly encountered when migrating very old StarOffice archives to modern presentation software.

How to open an SDA file

LibreOffice Impress can open SDA files directly thanks to built-in legacy StarOffice format support, automatically converting the content into its modern editing environment. Apache OpenOffice Impress also retains compatibility with this older format.

SDA Technical Info

Full Name: StarOffice/StarImpress Presentation
Developed By: StarDivision / Sun Microsystems
Initial Release: 1996
MIME Type: application/vnd.stardivision.impress

What is an OTP file?

The OTP (OpenDocument Presentation Template) format is an XML-based standard for presentation templates, maintained by the OASIS consortium and defined in the ISO/IEC 26300 specification. It utilizes ZIP compression to package XML manifests, styles, and multimedia assets into a single container. Unlike proprietary binary formats, OTP enforces strict open standards, ensuring interoperability across different software suites while storing layout master slides and styles for reusable presentation designs.

How to open an OTP file

OTP files are natively supported by open-source office suites adhering to the OpenDocument standard. Linux distributions often include LibreOffice Impress or Apache OpenOffice, which open these templates by default. On Windows and macOS, users can utilize Microsoft PowerPoint (version 2007 SP2 and later) or Corel WordPerfect Office, though LibreOffice remains the reference implementation for maximum rendering fidelity.

OTP Technical Info

Full Name: OpenDocument Presentation Template
Developed By: OASIS / Sun Microsystems
Initial Release: 2006
MIME Type: application/vnd.oasis.opendocument.presentation-template

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Why RunConvert

The fastest way to convert any file

Purpose-built for speed, privacy, and breadth of format support.

Convert SDA to OTP in seconds

Every SDA to OTP conversion runs on our servers, so your device stays fast and the output quality stays intact.

Fast, cloud-powered

No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.

Secure & private

Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.

Free - no account needed

Convert without creating an account - no credit card, no trial clock. Sign in only if you want history and higher daily limits.

Developer API

Convert SDA to OTP via API

Automate SDA to OTP conversions in three steps: create a job, upload your file, then poll for the result.

# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "tag": "sda-to-otp",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "otp"
      },
      "export-result": {
        "operation": "export/url",
        "input": "convert"
      }
    }
  }'

# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.sda

# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
  -H "Authorization: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.