PUB to JPG Converter
Convert PUB to JPG online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
Like RunConvert? Set us as a preferred source on Google.
Add to Preferred SourcesHow 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 a PUB file?
The PUB file extension denotes a desktop publishing document created by Microsoft Publisher, a component of the Microsoft Office suite. This proprietary format utilizes the Object Linking and Embedding (OLE) structured storage container to manage page layout components, including vector graphics, raster images, formatted text, and separate objects. Unlike standard word processing documents, PUB files prioritize absolute positioning of page elements for print-ready output. The format lacks a public specification, making interoperability with non-Microsoft software limited to reverse-engineered implementations.
How to open a PUB file
Opening PUB files requires Microsoft Publisher on Windows systems for full fidelity. For users without access to the native application, LibreOffice Draw provides partial support through reverse-engineered filters, though layout inconsistencies may occur. While Microsoft Word cannot natively open PUB files, Adobe InDesign can import them via third-party plugins like Pub2ID. There is no native support for this format on macOS or Linux kernel-based operating systems without virtualization or conversion tools.
PUB Technical Info
- Full Name
- Microsoft Publisher Document
- Developed By
- Microsoft Corporation
- Initial Release
- 1991
- MIME Type
- application/x-mspublisher
What is a JPG file?
JPG is functionally identical to the JPEG format, differing only in the file extension length, a legacy constraint from the MS-DOS 8.3 filename limit (which allowed only three characters for extensions). It implements the same ISO/IEC 10918 standard, using lossy compression based on Discrete Cosine Transform (DCT) and Huffman coding to store photorealistic images. The file structure contains markers such as Start of Image (SOI) and End of Image (EOI) and supports color spaces like sRGB and CMYK, making it interchangeable with .jpeg files in all software contexts.
How to open a JPG file
As one of the most ubiquitous file types in computing, JPG files open natively on Windows, macOS, and Linux without external software. Default viewers like Microsoft Photos, Apple Preview, and Linux image viewers handle the format automatically. For editing or conversion, industry-standard tools including Adobe Photoshop, Paint.NET, and XnView provide extensive support. Web browsers universally render JPGs without plugins.
JPG Technical Info
- Full Name
- Joint Photographic Experts Group
- Developed By
- Joint Photographic Experts Group
- Initial Release
- 1992
- MIME Type
- image/jpeg
More tools
Related conversions
Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert PUB to JPG in seconds
Every PUB to JPG 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 PUB to JPG via API
Automate PUB to JPG 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": "pub-to-jpg",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "jpg"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.pub
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$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.