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Online developer tools
Format JSON, encode or decode Base64 and URLs, generate UUIDs and hashes, and handle common developer text tasks.
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Browse by task按用途浏览
Find what you need.先选用途，再选工具。
10 available个可用工具
Developer tools开发与编码
Format, encode, inspect and generate developer-ready data.格式化、编码、检查并生成开发常用数据。
Epoch Converter时间戳转换
Convert Unix timestamps (seconds or milliseconds, auto-detected) to human-readable dates in local time, UTC, and ISO 8601 — and dates back to epoch. Live current timestamp.输入内容，快速使用时间戳转换完成开发任务。
devnest
JSON FormatterJSON 格式化
Format, validate, and minify JSON in your browser: pretty-print with your preferred indent, get exact error line and column, copy the result. Nothing is uploaded.输入内容，快速使用JSON 格式化完成开发任务。
devnest
Password Generator密码生成器
Generate strong random passwords with custom length and character sets. Cryptographically secure, generated entirely in your browser — nothing is ever sent anywhere.按长度和字符规则生成随机密码，强度清晰可见且不上传。
calcnest
Base64 Encode/DecodeBase64 编解码
Encode text to Base64 and decode Base64 to text, with full Unicode/UTF-8 support — emoji and Chinese included. Live, private, in-browser.输入内容，快速使用Base64 编解码完成开发任务。
devnest
Case Converter英文大小写转换
Convert text between 10 cases live: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and aLtErNaTiNg.输入内容，快速使用英文大小写转换完成开发任务。
devnest
Hash Generator哈希生成器
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text instantly in your browser. With honest guidance on which hashes are still safe to use.输入内容，快速使用哈希生成器完成开发任务。
devnest
Lorem Ipsum占位文本生成器
Generate lorem ipsum placeholder text: choose paragraphs and words per paragraph, start with the classic opening, copy in one click.输入内容，快速使用占位文本生成器完成开发任务。
devnest
Slug Generator网址短名生成器
Turn any title into a clean URL slug: lowercase, hyphens, accents stripped (Crème → creme). Live conversion with one-click copy.输入内容，快速使用网址短名生成器完成开发任务。
devnest
URL Encode/DecodeURL 编解码
URL-encode and decode text live: spaces, unicode, and special characters to percent-encoding and back. Understand %20 vs + and encodeURIComponent.输入内容，快速使用URL 编解码完成开发任务。
devnest
UUID GeneratorUUID 生成器
Generate cryptographically random UUID v4 identifiers — one or up to 100 at once, copy-ready. Learn the format and collision math.输入内容，快速使用UUID 生成器完成开发任务。
devnest
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