Decode a token fragment or encoded text
Use the Base64 workspace for text and Base64URL options. If the result looks corrupted, inspect the selected character set before changing the encoded input.
Base64 →
Choose by task
Base64, File, Image & URL Encoding Tools
Encode and decode Base64 text, recover files, inspect image data URLs, and escape URL components with tools that match the input format.
Browse these tools ↓Which tool should you start with?
Encoding changes how bytes are represented; it does not make them secret. Choose the tool from the expected destination: readable text, a binary download, an image data URL, or a URL component. That choice determines which character set, alphabet and escaping rules apply.
Recover an attachment from an API response
Use a file decoder when the output is binary. Preserve the expected file type, and do not treat arbitrary decoded bytes as a UTF-8 string.
Base64 File →Put a value into a query parameter
Encode the parameter value with the URL tool. Encoding a whole URL as one component also escapes its separators, so decide which part the receiving service expects.
URL Encoder →Check the result before the next step
Identify the source format before decoding. For text, confirm UTF-8 or the original character set; for Base64URL, check the URL-safe alphabet and padding. After a round trip, compare the recovered text or file bytes with the original. Do not apply URL encoding repeatedly to an already escaped value.
Encoding
Base64 Encoder & Decoder — Text, Files & Base64URL
Encode or decode Base64 text and files online. Supports UTF-8, Base64URL, padding, line-by-line conversion, data URIs, preview, and download in your browser.
Runs locally EncodingBase64 File Encoder & Decoder
Turn a file into Base64 or download a Base64 data URI as a file. Processing stays completely on your device.
Runs locally EncodingBase64 Image Encoder & Decoder
Convert PNG, JPEG, GIF, or WebP images to Base64 data URLs and preview or download Base64 images locally.
Runs locally EncodingURL Encoder & Decoder
Encode URL components or decode percent-encoded text locally, with clear handling for spaces and Unicode.
Runs locally