Encode text and files to Base64, decode with image preview, standard and URL-safe modes — all in your browser.
Also searched as: base64 converter · encode to base64 · decode from base64 · text to base64 · url safe base64
Step-by-step guide to get the most from this tool
Select Encode or Decode, and standard or URL-safe variant.
Type text or upload a file to encode.
See encoded/decoded result with size stats.
Decoded image Base64 shows an inline preview automatically.
What makes this tool stand out
Convert files to Base64 strings.
Inline preview for image data.
Base64 for URLs and headers.
Quick encode/decode toggle.
Input/output length and ratio.
Browser-only processing.
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Quick answers to common questions
Base64 encodes binary data as ASCII text using 64 printable characters — common in HTTP, email, and JSON.
Yes. Click Encode file to convert any file to Base64. Images show an inline preview when decoded.
Replaces + with - and / with _ so encoded strings work in URLs without extra encoding.
No. Base64 is encoding only — anyone can decode it. Use encryption for security.
Padding makes length a multiple of 4. Some systems omit padding.
Yes. Paste image Base64 or encode an image file to see an inline preview.
Moves output to input and toggles encode/decode mode for quick round-trips.
Yes. All encoding runs locally in your browser.
Your data is processed entirely in your browser. Nothing is sent to any server.