免费在线工具
视频压缩、图片编辑、PDF处理及开发者工具。所有处理都在您的浏览器中完成 - 您的文件永远不会离开您的设备。
视频工具
视频压缩工具
免费压缩 Discord、WhatsApp 和 Telegram 的视频。无需上传 — 所有处理都在您的浏览器中完成。支持 MP4、WebM、MOV。
视频转 MP3
免费在线从视频文件提取音频。将 MP4、WebM、MOV 转换为 MP3、WAV、AAC、OGG。无需上传 — 所有处理都在您的浏览器中完成。
视频转 GIF
免费在线将视频转换为 GIF。从 MP4、WebM、MOV 文件创建动态 GIF。自定义 FPS、大小和时长。无需上传。
视频格式转换工具
免费在线在 MP4、WebM、MOV 和 AVI 格式之间转换视频文件。无需上传 — 所有处理都在您的浏览器中完成。
Compress Video for Discord
Compress videos to fit Discord's 25MB file size limit. Free online tool, no upload to server. Works with MP4, MOV, MKV, WebM, and AVI.
Compress Video for WhatsApp
Compress videos to fit WhatsApp's 16MB file size limit. Free online tool, no upload to server. Perfect for sharing videos in chats and Status.
Compress Video for Email
Compress videos to attach to emails. Fits Gmail's 25MB and Outlook's 10MB limits. Free online tool, no upload to server.
Compress Video for Telegram
Compress videos for Telegram's 2GB file limit. Free online tool, no upload to server. Reduce video size while keeping quality. Works with MP4, MOV, MKV.
Compress Video for TikTok
Compress videos for TikTok upload. Meet TikTok's file size requirements. Free online tool, no server upload. Works with MP4, MOV, WebM.
Compress Video for YouTube
Compress videos for faster YouTube uploads. Optimize file size while maintaining quality. Free online tool, no server upload. MP4, MOV, MKV supported.
Compress Video for Facebook
Compress videos for Facebook posts and stories. Meet Facebook's upload requirements. Free online tool, no server upload. MP4, MOV supported.
Compress Video for Twitter/X
Compress videos for Twitter/X posts. Meet the 512MB file limit. Free online tool, no server upload. Works with MP4, MOV, MKV.
Compress Video for Instagram
Compress videos for Instagram Reels, Stories, and Posts. Meet size and format requirements. Free online tool, no server upload.
Convert MOV to MP4
Convert MOV files to MP4 format online for free. No file upload to server, all processing in browser. Fast, private, and secure.
Convert MKV to MP4
Convert MKV files to MP4 format online for free. No file upload to server, all processing in browser. Keep quality, universal playback.
Convert AVI to MP4
Convert AVI files to MP4 format online for free. No file upload to server, all processing in browser. Reduce file size, universal playback.
Convert WebM to MP4
Convert WebM files to MP4 format online for free. No file upload to server, all processing in browser. Play WebM videos anywhere.
图片工具
图片压缩工具
免费在线压缩和转换图片。在保持质量的同时减小 JPG、PNG、WebP 文件大小。无需上传 - 所有处理都在您的浏览器中完成。
社交媒体裁切工具
为 Instagram、Facebook、Twitter、YouTube、LinkedIn 和 TikTok 调整图片大小。每次都是完美尺寸。免费，无需上传。
HEIC 转 JPG
免费在线将 HEIC/HEIF 图片转换为 JPG。适合 iPhone 照片。无需上传 - 所有处理都在您的浏览器中完成。
图片水印
免费在线为图片添加文字水印。自定义字体、位置、透明度和颜色。无需上传 - 所有处理都在您的浏览器中完成。
Resize Image for Instagram
Resize images to perfect Instagram dimensions. Post (1080x1080), Story (1080x1920), Portrait (1080x1350), and Landscape (1080x566). Free, no upload needed.
Resize Image for X (Twitter)
Resize images for X (Twitter) posts, profile pictures, and headers. Post (1200x675), Profile (400x400), Header (1500x500). Free, no upload needed.
Resize Image for LinkedIn
Resize images for LinkedIn posts, profile pictures, and cover images. Post (1200x627), Profile (400x400), Cover (1584x396). Free, no upload needed.
Compress Images for Web
Optimize images for websites and web apps. Convert to WebP, reduce file sizes for faster page loads and better Core Web Vitals. Free, no upload needed.
Compress PNG Online
Compress PNG images online for free. Reduce PNG file size without losing quality. No upload to server, all processing in browser. Batch support.
Compress JPG Online
Compress JPG/JPEG images online for free. Reduce file size while keeping quality. No upload to server, all processing in browser. Batch support.
Resize Image for Facebook
Resize images for Facebook cover photos, profile pictures, posts, and ads. Perfect dimensions for every Facebook format. Free, no upload.
Resize Image for YouTube
Resize images for YouTube thumbnails, channel banners, and profile pictures. Perfect dimensions. Free online tool, no upload.
Resize Image for TikTok
Resize images for TikTok profile pictures, video covers, and ad creatives. Perfect dimensions. Free online tool, no upload.
PDF工具
PDF 合并
免费在线将多个 PDF 文件合并为一个。拖放重新排列页面顺序。无需上传 - 所有处理都在您的浏览器中完成。
PDF 分割
免费在线将 PDF 文件分割为单独页面或自定义范围。无需上传 - 所有处理都在您的浏览器中完成。
PDF 压缩工具
免费在线压缩 PDF 文件以减小大小。为电子邮件和分享优化 PDF。无需上传 - 所有处理都在您的浏览器中完成。
图片转 PDF
免费在线将图片转换为 PDF。将 JPG、PNG、WebP 图片合并为单个 PDF。选择页面大小和边距。无需上传。
JPG to PDF Converter
Convert JPG images to PDF online for free. Combine multiple JPGs into one PDF. No upload to server, all processing in browser.
PNG to PDF Converter
Convert PNG images to PDF online for free. Combine multiple PNGs into one PDF with transparency support. No upload to server.
Compress PDF for Email
Compress PDF files for email attachments. Reduce size to under 25MB, 10MB, or 5MB. Free online tool, no upload to server.
开发者工具
JSON 格式化工具
免费在线格式化、压缩和验证 JSON。支持自定义缩进的美化输出。无需上传 - 所有处理都在浏览器中完成。
JWT 解码器
免费在线解码和检查 JSON Web Token (JWT)。查看标头、有效负载和过期时间。无需上传 - 所有处理都在浏览器中完成。
Base64 编码 / 解码
免费在线编码和解码 Base64 字符串。支持 Unicode 文本。无需上传 - 所有处理都在浏览器中完成。
正则表达式测试器
免费在线测试正则表达式。实时匹配并高亮显示。支持 JavaScript 正则表达式语法。无需上传。
JSON Validator
Validate JSON syntax online for free. Find and fix JSON errors instantly. Detailed error messages with line numbers. No upload to server.
Base64 Decoder
Decode Base64 strings to text online for free. Instant decoding, no upload to server. Also encode text to Base64. Supports UTF-8.