免費線上工具
影片壓縮、圖片編輯、PDF處理及開發者工具。所有處理都在您的瀏覽器中完成 - 您的檔案永遠不會離開您的裝置。
影片工具
影片壓縮工具
免費壓縮 Discord、WhatsApp 和 Telegram 的影片。無需上傳 — 所有處理都在您的瀏覽器中完成。支援 MP4、WebM、MOV。
影片轉 MP3
免費線上從影片檔案擷取音訊。將 MP4、WebM、MOV 轉換為 MP3、WAV、AAC、OGG。無需上傳 — 所有處理都在您的瀏覽器中完成。
影片轉 GIF
免費線上將影片轉換為 GIF。從 MP4、WebM、MOV 檔案建立動態 GIF。自訂 FPS、大小和時長。無需上傳。
影片格式轉換工具
免費線上在 MP4、WebM、MOV 和 AVI 格式之間轉換影片檔案。無需上傳 — 所有處理都在您的瀏覽器中完成。
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.
圖片工具
圖片壓縮工具
免費線上壓縮和轉換圖片。在保持品質的同時減小 JPG、PNG、WebP 檔案大小。無需上傳 - 所有處理都在您的瀏覽器中完成。
社群媒體裁切工具
為 Instagram、Facebook、Twitter、YouTube、LinkedIn 和 TikTok 調整圖片大小。每次都是完美尺寸。免費，無需上傳。
HEIC 轉 JPG
免費線上將 HEIC/HEIF 圖片轉換為 JPG。適合 iPhone 照片。無需上傳 - 所有處理都在您的瀏覽器中完成。
圖片浮水印
免費線上為圖片添加文字浮水印。自訂字體、位置、透明度和顏色。無需上傳 - 所有處理都在您的瀏覽器中完成。
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 合併
免費線上將多個 PDF 檔案合併為一個。拖放重新排列頁面順序。無需上傳 - 所有處理都在您的瀏覽器中完成。
PDF 分割
免費線上將 PDF 檔案分割為單獨頁面或自訂範圍。無需上傳 - 所有處理都在您的瀏覽器中完成。
PDF 壓縮工具
免費線上壓縮 PDF 檔案以減小大小。為電子郵件和分享最佳化 PDF。無需上傳 - 所有處理都在您的瀏覽器中完成。
圖片轉 PDF
免費線上將圖片轉換為 PDF。將 JPG、PNG、WebP 圖片合併為單一 PDF。選擇頁面大小和邊距。無需上傳。
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.
開發者工具
JSON 格式化工具
免費線上格式化、壓縮和驗證 JSON。使用自訂縮排美化輸出。無需上傳 - 所有處理都在您的瀏覽器中完成。
JWT 解碼器
免費線上解碼和檢查 JSON Web Tokens（JWT）。查看標頭、載荷和到期時間。無需上傳 - 所有處理都在您的瀏覽器中完成。
Base64 編碼器 / 解碼器
免費線上編碼和解碼 Base64 字串。支援 Unicode 文字。無需上傳 - 所有處理都在您的瀏覽器中完成。
正規表達式測試器
免費線上測試正規表達式。即時比對和高亮顯示。支援 JavaScript 正規表達式語法。無需上傳。
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.