Does PNG to Base64 preserve transparency?

Yes! PNG transparency (alpha channel) is fully preserved when encoding to Base64. The decoded image will be identical. Everything is processed locally in your browser, so your files never leave your device.

What is the size increase for PNG Base64?

Base64 increases PNG size by ~33%. A 10KB PNG becomes ~13.3KB as Base64. Consider this when embedding in HTML/CSS. Everything is processed locally in your browser, so your files never leave your device.

Can I optimize PNG before Base64?

Yes! Use our Image Compressor first to reduce PNG size, then encode to Base64 for smallest possible data URI. Everything is processed locally in your browser, so your files never leave your device. This keeps your data private and avoids waiting for server processing.

Is PNG better than JPG for Base64?

For graphics with transparency or text, yes. For photos, JPG produces smaller Base64 strings. Choose format based on image content.

Is this tool free to use?

Yes. There is no charge, no account, and no watermark on the output. Everything is processed locally in your browser, so your files never leave your device. This keeps your data private and avoids waiting for server processing.

PNG to Base64 — Png To Base64

PNG to Base64

Convert PNG to Base64. PNG keeps transparency and stays crisp — ideal for logos, icons, and graphics with sharp edges.

Why it matters: PNG keeps transparency and stays crisp — ideal for logos, icons, and graphics with sharp edges. Generate the string with no uploads.

How to convert an image to Base64 (and back)

1Choose Encoder to turn an image into Base64, or Decoder to turn a string back into an image.
2Pick your output — raw, URL-safe, no-padding, or wrapped — and decide whether to include the data: prefix.
3Copy to clipboard or download as a file. Everything runs locally — nothing is uploaded.

Best settings for this page: Upload your PNG image, choose your output format, and copy or download the Base64.

All processing runs locally in your browser. Your images and strings are not uploaded to any server.

Base64 basics: size, data URIs, and when to use it

Size trade-off — Base64 inflates binary data by about 33%. It is best for small assets (icons, logos) and single-file pages; for large images, external files with caching are faster.

Data URI — a data URI is raw Base64 prefixed with a MIME type, e.g. data:image/png;base64,.... Include the prefix for HTML/CSS; store raw Base64 for JSON or databases.

URL-safe — RFC 4648 §5 swaps + and / for - and _ and drops padding, making the string safe for URLs, JWTs, and filenames.

Use it for embedding images in code, email, and APIs where an extra HTTP request is worse than the size cost.

Frequently Asked Questions

All Base64 Tools

Encode or decode images to and from Base64 — pick a tool:

Encode

Image to Base64 Encoder JPG to Base64 WebP to Base64 SVG to Base64 GIF to Base64 ICO to Base64 Converter BMP to Base64 AVIF to Base64 TIFF to Base64

Decode

Base64 to Image Decoder Base64 to PNG Decoder Base64 to JPG Decoder Base64 to WebP Decoder Base64 to GIF Decoder Base64 to SVG Decoder Base64 to ICO Decoder Base64 to BMP Decoder

Features

HTML Favicon Embed URL-Safe Base64 Encoder Data URI Generator

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Related Tools

Other valuable image tools from Chaudify:

Image Compressor Image Converter Image Resizer Favicon Generator

PNG to Base64

Output Settings

Image Preview

Base64 Output

Paste Base64 String

Decoded Image

Related reading

PNG to Base64

How to convert an image to Base64 (and back)

Base64 basics: size, data URIs, and when to use it

Frequently Asked Questions

All Base64 Tools

Encode

Decode

Features

More Tools

Related Tools