Base64 File Converter

Convert images, PDFs, and binary files to Base64 Data URLs or restore files from Base64 strings. client-side with zero data upload.

Drag & drop a file here, or click to select

Max file size: 50MB

Base64 Output

Continue With

Continue your workflow with these related next steps
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输入文本内容 ➔ 实时进行 Base64 规范编码或反向解码还原

Image Compressor

拖入多张图片 ➔ 调整自适应压缩质量 ➔ 减小文件 MB 体积并批量打包

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Code Diff Viewer

选择目标编程语言并在左右两侧粘贴代码 ➔ 语法高亮实时对比并导出 Unified Patch 补丁

Pure Client-Side Local Memory Processing · Zero Data Upload

Usage Guide

  • 1. Drag and drop any image or file, or paste an existing Base64 DataURL string.
  • 2. The file is read instantly via the browser's native FileReader without uploading to any server.
  • 3. Copy the generated DataURI snippet or download the restored file directly.

Security & Privacy Guarantee

  • 1. Zero network latency: process large files at disk-read speeds.
  • 2. Complete data privacy: confidential documents never leave your machine.
  • 3. Automatic MIME-type detection and formatted output for CSS/HTML embedding.

Frequently Asked Questions

Q: What is a Base64 Data URL?
A: A Data URL is a URI scheme that allows resource files (like images) to be embedded directly inline inside HTML or CSS files, avoiding extra HTTP requests.
Q: Are my uploaded files stored anywhere?
A: No. All file reading is performed entirely in memory using browser client APIs. Nothing is transmitted over the internet.