Image Decoding
Decode a still PNG or JPEG and fit it inside an A4 or US Letter PDF page. The image keeps its proportions and is not cropped.
Base64 to PDF
Decode an encoded PDF or image, or print Base64 text as page images.
Choose Your Files
Drop files here or use the button below.
Up to 28 MB total · Files stay on your device
Preview the document here. For added content, this is a placement guide; check the saved output.
Table of Content10 Sections
Which Base64 to PDF Mode Do You Need?
A Base64 string may represent a whole PDF, an image or other bytes. Choose the mode that matches your input: decode a PNG/JPEG image into a PDF, restore an already encoded PDF, or print the Base64 characters themselves as page images.
Upload the encoded text in a UTF-8 .txt or .base64 file. Standard padded Base64 and PNG, JPEG or PDF data URIs are accepted. The tool does not fetch a URL or decide the meaning of arbitrary encoded data for you.
Base64 to PDF Features
Exact PDF Restoration
Recover the original bytes when the payload already contains a readable PDF. Existing document features remain unchanged rather than being rebuilt.
Text as Page Images
Print the literal Base64 characters when you need an image-based record of the encoded text. This mode does not decode the underlying content.
Explicit Input Checks
Validate padding, permitted data URI types, decoded file signatures and image dimensions. Malformed input receives an error instead of a mislabeled PDF.
How Do I Convert Base64 to PDF?
- Save the Base64 string or supported data URI in a UTF-8 .txt or .base64 file.
- Select the file and choose the mode matching its content.
- For image or literal-text output, choose the page size, orientation and margins. Literal mode also has a text-size setting.
- Start conversion and download the result.
- Open the PDF and check whether it contains the expected image, original document or printed Base64 characters.
Select the Encoded File
Choose the local text file containing Base64 data.
Select the screenshot to enlarge it.
Choose the Correct Mode
Select image decoding, original PDF restoration or literal text printing.
Select the screenshot to enlarge it.
Inspect the Result
Download the PDF and confirm that its content matches the selected mode.
Select the screenshot to enlarge it.
Screenshots show this toolkit using harmless sample files. Your file name, page count and settings may differ.
Why Separate These Conversion Modes?
Decoding an image, restoring a PDF and printing encoded characters produce different results. An integration tester may need the original PDF bytes, while a reviewer may need a page showing an encoded sample. Selecting the purpose explicitly prevents a text listing from being mistaken for a decoded document.
Who Can Use These Base64 Modes?
Integration Developers
Restore a PDF returned by an interface and compare it with a known source.
Image Workflow Teams
Turn a Base64-encoded PNG or JPEG into a proportionally fitted PDF page.
Technical Reviewers
Create a visible, image-based record of a short encoded text sample.
Settings and Output Checks
| Setting | What to Expect |
|---|---|
| Encoded source | One UTF-8 .txt or .base64 file up to 28 MiB; decoded data up to 20 MiB. |
| Image mode | Still PNG or JPEG, up to 16 megapixels and 16,384 pixels on either side. Animated PNG is rejected. |
| Original PDF mode | A readable, unencrypted PDF with no more than 500 pages. Page layout settings do not apply. |
| Literal text mode | Up to 50,000 source characters; the output contains page images without a selectable text layer. |
Recover an Image Instead of Printing Its Code
A string starting with data:image/png;base64, declares an encoded PNG. Choose image decoding to place that image in the PDF. Choosing literal text instead prints the prefix and Base64 letters themselves. For a data URI beginning with data:application/pdf;base64, choose original PDF decoding to restore the encoded document.
Troubleshooting Base64 to PDF
| Situation | What to Check |
|---|---|
| The encoded text is invalid | Check for missing padding, truncation or unsupported characters. Standard spaces, tabs and line breaks are allowed. |
| The chosen mode rejects the decoded data | Use PDF mode for an encoded PDF and image mode for PNG/JPEG bytes. Renaming a different format does not convert it. |
| An image exceeds the dimension limit | Resize the original image before encoding it. The tool checks dimensions before bitmap decoding. |
FAQs
Can It Fetch a Base64 Image from a URL?
No. Supply the encoded text in a local file. The converter does not request external image or document URLs.
Does Decoding an Original PDF Sanitize It?
No. The encoded PDF bytes are restored unchanged. Active content, signatures and other features are not cleaned or verified by this operation.
Will Printed Base64 Text Be Selectable?
No. Literal mode renders the characters into page images. Keep the original text file when you need to copy, search or decode the payload.