Base64 to PDF & PDF to Base64
Convert Base64 strings directly into downloadable PDF files with real-time preview, or encode PDF documents into clean Base64 data URIs. Everything runs 100% privately inside your web browser.
Paste Base64 String
Supports raw Base64 strings or data:application/pdf;base64,... Data URIs
100% Client-Side Secure
Your PDF files and Base64 encoded strings never leave your device. All decoding and encoding happens locally in your browser memory.
Instant PDF Preview
Preview rendered PDF pages instantly in real-time before downloading. Verify documents, invoices, or reports with zero hassle.
Multiple Output Formats
Export PDF to Base64 as Data URIs, raw Base64 strings, HTML <embed> tags, or JSON payloads for API testing.
Frequently Asked Questions
How do I convert a Base64 string to a PDF file?
Paste your Base64 string into the input box above. The tool automatically detects whether it is a raw Base64 string or a Data URI (data:application/pdf;base64,...) and renders an instant live PDF preview. Click Download PDF File to save the document to your computer or phone.
Is it safe to convert sensitive PDF documents here?
Yes, 100%! Unlike server-based converter websites, ToolJi processes all files locally using native HTML5 JavaScript APIs. No files, Base64 strings, or data are ever uploaded to any external server.
How do I convert a PDF document to Base64?
Switch to the PDF ➔ Base64tab, drag & drop your PDF document into the upload area, and copy the generated Base64 string or Data URI with one click.