# Base64 to PDF converter

- Human page: https://happytails.ai/en/pdf-tools/base64-to-pdf/
- Markdown: https://happytails.ai/en/pdf-tools/base64-to-pdf.md
- Structured JSON: https://happytails.ai/agents/en/pdf-tools/base64-to-pdf/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `base64-to-pdf` |
| Category | pdf-tools |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Use the visible action or interactive controls. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | Not callable through HTTP. |
| Browser-agent interface | run_current_tool |

### Implementation notes

Paste standard padded Base64 or a data:application/pdf;base64 URL. Spaces and line breaks are ignored. Up to 1,000,000 input characters. The decoded bytes must be an unencrypted, readable PDF.

### Inputs and settings

Text input: Base64-encoded PDF.

Example or placeholder shown in the interface (not a validated fixture):

```text
JVBERi0xLjcK…
```

Paste the complete Base64 content. This example is only the start of a PDF encoding. Up to 1,000,000 characters. Review the settings before running.

No additional settings are declared for this tool.

### Browser-agent workflow

1. Open the human page in a browser that supports WebMCP.
2. Discover the interface exposed by that page; use its actual schema.
3. Select files on the page first when the tool requires files.
4. Call `run_current_tool` with valid input and settings.
5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.

Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.

### Planning specification

Input is limited to 1,000,000 characters and must decode to a readable, unencrypted PDF. Base64 is encoding, not encryption. Your pasted content is processed in the browser.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "base64-to-pdf",
  "category": "pdf-tools",
  "built": true,
  "requirements": "Input is limited to 1,000,000 characters and must decode to a readable, unencrypted PDF. Base64 is encoding, not encryption. Your pasted content is processed in the browser.",
  "implementation": {
    "fields": [],
    "note": "Paste standard padded Base64 or a data:application/pdf;base64 URL. Spaces and line breaks are ignored. Up to 1,000,000 input characters. The decoded bytes must be an unencrypted, readable PDF.",
    "experience": {
      "automatic": false,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Base64-encoded PDF",
      "placeholder": "JVBERi0xLjcK…",
      "help": "Paste the complete Base64 content. This example is only the start of a PDF encoding. Up to 1,000,000 characters. Review the settings before running.",
      "action": null
    },
    "mode": "explicit",
    "interactive": false
  },
  "execution": "Browser interface",
  "api": null,
  "browser_agent": {
    "supported": true,
    "name": "run_current_tool",
    "discovery": "WebMCP on the human page in a supporting browser",
    "verification": "See audit/API-AUDIT.md; availability is not verification"
  }
}
```

## Page guide

Decode Base64 into a downloadable PDF.

How can we improve this tool?

Report a problem or share an idea.

Please leave out private information. Your message and the tool name go to our team via PostHog.

### How to use Base64 to PDF converter

1. Enter base64-encoded pdf in the input field.
2. Review the settings, then choose Run Base64 to PDF converter.
3. Review the result, then use Copy result or a download link when available.

## Useful next steps

- [PDF to Base64 converter](https://happytails.ai/en/pdf-tools/pdf-to-base64/) ([Markdown](https://happytails.ai/en/pdf-tools/pdf-to-base64.md))

- [PDF metadata editor](https://happytails.ai/en/pdf-tools/pdf-metadata-editor/) ([Markdown](https://happytails.ai/en/pdf-tools/pdf-metadata-editor.md))

- [Merge PDF](https://happytails.ai/en/pdf-tools/merge-pdf/) ([Markdown](https://happytails.ai/en/pdf-tools/merge-pdf.md))

## How to use it

Paste the complete standard Base64 string or a data:application/pdf;base64 URL. Spaces and line breaks are ignored. Convert to validate and download the PDF.

### A worked example

Encode a PDF with PDF to Base64, then paste that full result here. The decoded PDF retains the original bytes. A short fragment such as JVBERi0 is not a complete document.

### What to know

Input is limited to 1,000,000 characters and must decode to a readable, unencrypted PDF. Base64 is encoding, not encryption. Your pasted content is processed in the browser.