Free Base64 Encoder & Decoder
Convert any file — image, audio, PDF, video, font — to a Base64 string for embedding in HTML, CSS, JSON or an API payload. Or paste a Base64 string / data URI to decode it back into a downloadable file. Everything runs locally in your browser: nothing is ever uploaded to a server.
Drop any file here
or click to browse
Images · Audio · Video · PDF · Fonts — any file type, up to 15 MB
Common Base64 conversions
Image to Base64 (PNG, JPG, SVG, WebP, ICO, GIF, AVIF)
Embed images directly inside HTML or CSS with a data:image/png;base64,… URI — no separate image request, useful for small icons, favicons and inline SVGs.
Audio to Base64 (MP3, WAV, OGG)
Many APIs (speech-to-text, messaging platforms, chatbots) expect audio as a Base64 payload rather than a binary upload. Drop your MP3 or WAV file above to get the string instantly.
PDF to Base64
Useful for sending documents through JSON APIs or storing small PDFs directly in a database field.
Base64 to file (decode)
Paste a Base64 string or full data URI in the Decode tab and DinoConvert rebuilds the original file for download — it also tries to auto-detect the file type from the data URI's MIME type.
