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JSON转Base64

JSON 与 Base64 互转，支持 UTF-8。

base64编码
关于「JSON转Base64」

它属于「JSON 工具」分类：JSON 的格式化、结构变换与各种数据格式互转。

  • 编码前会先把 JSON <b>压缩</b>去掉空白，能让结果短不少。
  • 中文等非 ASCII 字符通过 <b>UTF-8</b> 正确编码，不会出现乱码。
  • <b>URL 安全变体</b>把 <code>+ /</code> 换成 <code>- _</code> 并去掉结尾的 <code>=</code>，可直接放进 URL 或 JWT。
  • 解码后若内容是合法 JSON 会自动格式化，否则原样输出纯文本。
  • Base64 只是编码不是加密，<b>任何人都能还原</b>，不要用它保护敏感信息。

完全免费、无需注册；所有处理都在浏览器本地完成，文件不会上传到任何服务器。

相关关键词：JSON转Base64、JSON 工具、base64、编码、在线工具、免费

如何使用「JSON转Base64」
  1. 打开工具：打开「JSON转Base64」页面，无需注册、无需安装任何软件。
  2. 准备输入：准备好要处理的内容或文件：文本可直接粘贴，文件可拖入页面（本工具属于「JSON 工具」）。
  3. 填入内容：把内容粘贴进输入框，或把文件拖入页面；也可以点击「示例」先填入样例数据试一下。
  4. 设置选项并处理：按需调整页面上的选项，然后点击处理 / 转换 / 生成按钮。
  5. 获取结果：处理完全在浏览器本地完成，结果可直接复制或下载，文件不会上传到任何服务器。
常见问题
Base64 能当作加密使用吗？
绝对不能。它是一种公开的可逆编码，目的只是让二进制数据能在文本通道里安全传输。任何人拿到编码结果都能瞬间还原出原文。
为什么编码后反而变长了？
Base64 用 4 个字符表示 3 个字节，体积必然增加约 33%。它换来的是内容不含特殊字符，可以安全地嵌入 URL、JSON 或邮件正文。
什么时候需要 URL 安全变体？
标准 Base64 里的 <code>+</code> 和 <code>/</code> 在 URL 中有特殊含义，<code>=</code> 也容易被截断。放进查询参数、路径或 JWT 时，就要用 URL 安全变体。
中文会乱码吗？
不会。工具先用 UTF-8 把文本编成字节再做 Base64，解码时按相同规则还原，中文、emoji 都能完整往返。
JSON to Base64 (English)

Convert JSON to and from Base64 with UTF-8 support.

Belongs to “JSON Tools”: Format, transform and convert JSON to and from various data formats.

  • Before encoding, JSON is <b>minified</b> to drop whitespace, making the result much shorter.
  • Non-ASCII chars like Chinese are correctly encoded via <b>UTF-8</b>, no mojibake.
  • The <b>URL-safe variant</b> swaps <code>+ /</code> for <code>- _</code> and drops trailing <code>=</code>, ready for URLs or JWTs.
  • After decoding, valid JSON is auto-formatted; otherwise it is output as plain text.
  • Base64 is encoding, not encryption — <b>anyone can reverse it</b>; do not use it to protect sensitive data.

Free, no sign-up; everything runs locally in your browser and files are never uploaded.

Keywords: JSON to Base64, JSON Tools, base64, encode, online tool, free

How to use it

  1. Open the tool：Open the “JSON to Base64” page — no sign-up and nothing to install.
  2. Prepare the input：Prepare the content or file to process: paste text or drop a file onto the page (this tool belongs to “JSON Tools”).
  3. Provide the input：Paste your content into the input box or drop a file onto the page; you can also click “Sample” to try example data first.
  4. Adjust options and run：Adjust the options if needed, then click the process / convert / generate button.
  5. Get the result：Everything runs locally in your browser; copy or download the result — your files are never uploaded.

FAQ

Can Base64 be used as encryption?
Never. It is a public, reversible encoding meant only to let binary data travel safely in text channels. Anyone with the output can instantly recover the original.
Why is it longer after encoding?
Base64 uses 4 chars for 3 bytes, so size grows ~33%. In return the content has no special chars and can safely embed in URLs, JSON or email.
When do I need the URL-safe variant?
Standard Base64 <code>+</code> and <code>/</code> are special in URLs and <code>=</code> gets truncated. Use the URL-safe variant in query params, paths or JWTs.
Will Chinese become garbled?
No. The tool encodes text to bytes via UTF-8 before Base64, and reverses it on decode, so Chinese and emoji round-trip intact.

More tools in JSON Tools

  • JSON Formatter/Minifier — Beautify, minify, validate and highlight JSON.
  • Sort JSON Keys — Recursively sort object keys alphabetically to ease diffing.
  • Flatten JSON — Flatten nested structures into a.b.c single-level keys.
  • Unflatten JSON — Restore dotted-path objects into nested structures.
  • JSON to CSV — Convert an array of objects into a downloadable CSV.
  • CSV to JSON — Parse CSV text or files into a JSON array.
  • JSON to Excel — Export an array of objects as an .xlsx workbook.
  • Excel to JSON — Upload an Excel file and convert sheets to JSON.
  • JSON to XML — Convert JSON structures into well-indented XML.
  • XML to JSON — Parse an XML document into an equivalent JSON object.
  • JSON to YAML — Convert JSON into more readable YAML.
  • YAML to JSON — Parse YAML config into standard JSON.
  • JSON to SQL — Generate INSERT statements and CREATE TABLE DDL from arrays.
  • SQL to JSON — Reverse-engineer JSON data from INSERT statements.
  • JSON ⇄ Cookie — Convert between Cookie strings and JSON key-values.
  • JSON Diff — Recursively compare two JSON documents, marking add/delete/change.

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