OTF to EOT Converter

Convert OTF to EOT 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

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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 OTF file?

The OpenType Font (OTF) format is a cross-platform scalable font standard developed jointly by Adobe and Microsoft in 1996 to supersede TrueType and PostScript Type 1 formats. OTF files encapsulate outline data using either Compact Font Format (CFF) based on cubic Bézier curves (PostScript) or TrueType outlines based on quadratic Bézier curves. The format adheres to ISO/IEC 14496-22 (Open Font Format) standards and supports advanced typographic features such as ligatures, glyph substitution, and alternate characters via feature tables (GSUB, GPOS).

How to open an OTF file

OTF files enjoy native support across all major operating systems, including Windows, macOS, Linux, Android, and iOS. Users can install the font by double-clicking the file to launch the OS-native Font Viewer (Windows) or Font Book (macOS) and selecting the install option. For editing glyph paths or kerning metrics, vector graphic editors like Adobe Illustrator or dedicated typography software such as Glyphs and FontLab are required.

OTF Technical Info

Full Name: OpenType Font
Developed By: Adobe Systems, Microsoft
Initial Release: 1996
MIME Type: font/otf

What is an EOT file?

The Embedded OpenType (EOT) format is a legacy font file standard developed by Microsoft in 1997 specifically for use with Internet Explorer. It functions as a compact wrapper for TrueType (TTF) and OpenType (OTF) fonts, utilizing MicroType Express compression to reduce file size for web transmission. EOT files employ a proprietary structure that includes embedding permission flags to prevent unauthorized usage, adhering to Digital Rights Management (DRM) protocols. While submitted to the W3C in 2008, it was eventually superseded by WOFF, though it remains relevant for supporting older browser versions like IE8 and below.

How to open an EOT file

EOT files are designed exclusively for web rendering by the Trident layout engine found in Microsoft Internet Explorer. They are not intended for direct opening or installation on a local operating system like Windows or macOS. To view or edit the glyph data contained within an EOT file, users must convert it back to a TTF or OTF source format using specialized font engineering software such as FontForge or online conversion utilities.

EOT Technical Info

Full Name: Embedded OpenType
Developed By: Microsoft
Initial Release: 1997
MIME Type: application/vnd.ms-fontobject

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Why RunConvert

The fastest way to convert any file

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

Convert OTF to EOT in seconds

Every OTF to EOT 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 OTF to EOT via API

Automate OTF to EOT 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": "otf-to-eot",
    "tasks": {
      "upload-file": {
        "operation": "import/upload"
      },
      "convert": {
        "operation": "convert",
        "input": "upload-file",
        "output_format": "eot"
      },
      "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.otf

# 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.