PDB to AZW3 Converter
Convert PDB to AZW3 online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
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 a PDB file?
In the context of eBooks, the PDB (Palm Database) format is a sequential record-based container originally engineered for the Palm OS platform. The file structure consists of a fixed-length header containing metadata (such as Type and Creator IDs) followed by a list of record offsets and the raw data records. For digital reading, these records typically contain text compressed via the PalmDOC (LZ77) or zTXT algorithms, effectively acting as a wrapper for eReader content.
How to open a PDB file
Modern desktop operating systems do not include native handlers for Palm OS databases. Users looking to access eBook content within PDB files should use Calibre or STDU Viewer, which can interpret the specific PalmDOC compression. Note that PDB is also an extension for 'Program Database' debug files in Visual Studio; these are binary disparate and require Microsoft development tools, not eBook readers.
PDB Technical Info
- Full Name
- Palm Database
- Developed By
- Palm, Inc.
- Initial Release
- 1996
- MIME Type
- application/vnd.palm
What is an AZW3 file?
AZW3, also known as Kindle Format 8 (KF8), is the successor to the original AZW standard, engineered to support a subset of HTML5 and CSS3 specifications. Unlike its predecessor, AZW3 enables advanced formatting features including Scalable Vector Graphics (SVG), embedded fonts, and complex layouts within a proprietary binary wrapper. The format structure is a compiled database that allows for both reflowable content and fixed-layout elements, catering to the rendering capabilities of fourth-generation and later Kindle E Ink devices.
How to open an AZW3 file
Primary support is provided by Amazon Kindle devices (Generation 4+) and the official Kindle reading apps. For desktop viewing without Amazon software, Calibre and SumatraPDF (Windows) offer rendering support for DRM-free AZW3 files. Users on Linux can utilize eBook viewers like FBReader or coolreader provided the files are unencrypted.
AZW3 Technical Info
- Full Name
- Kindle Format 8
- Developed By
- Amazon
- Initial Release
- 2011
- MIME Type
- application/vnd.amazon.ebook
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Why RunConvert
The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert PDB to AZW3 in seconds
Every PDB to AZW3 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
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Developer API
Convert PDB to AZW3 via API
Automate PDB to AZW3 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": "pdb-to-azw3",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "azw3"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.pdb
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$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.