What is Base64 padding?

Base64 uses = characters at the end to make the output length a multiple of 4. These are called padding characters. Many APIs and systems do not need them.

Why remove Base64 padding?

Removing padding produces shorter strings. Useful for URLs, compact storage, and APIs that auto-restore padding during decoding.

Is unpadded Base64 valid?

Yes. RFC 4648 allows omitting padding. Many modern systems (JWT, base64url) use unpadded Base64. Always restore padding before strict decoding.

How do I decode unpadded Base64?

Add padding back: count characters mod 4 and append = as needed. Then decode normally. Most modern decoders handle this automatically.

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.

Base64 Without Padding — Skip Padding

Base64 Without Padding

Stripping = padding yields shorter strings for URLs and APIs; padding is auto-restored on decode. Use our tool to generate the Base64 instantly.

Why it matters: Stripping = padding yields shorter strings for URLs and APIs; padding is auto-restored on decode.

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 an image, choose your output format, and copy or download the result.

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 PNG to Base64 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

More Tools

HTML Base64 Encoder CSS Base64 Encoder JSON Base64 Encoder Email Base64 Encoder Database Base64 Storage Base64 Strip Padding Batch Base64 Converter Base64 with Compression Base64 Export Tools React Base64 Encoder Vue Base64 Encoder Angular Base64 Encoder Email Client Base64 Guide Svelte Base64 Encoder Next.js Base64 Encoder Node.js Base64 Encoder Python Base64 Encoder

Related Tools

Other valuable image tools from Chaudify:

Image Compressor Image Converter Image Resizer Favicon Generator

Base64 Without Padding

Output Settings

Image Preview

Base64 Output

Paste Base64 String

Decoded Image

Related reading

Base64 Without Padding

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