H.265 to H.264: measured CRF tradeoffs
Compare three x264 settings from the same 720p HEVC fixture and see exactly what changed.
Read the test and findings →免费在线音频、视频和文件转换器
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Document conversions are best-effort. Complex layouts, fonts, comments, tracked changes, and form fields may change in the output.
Structured data conversions preserve the data where possible, but key ordering, comments, quoting, and XML-specific details may change in the output.
转换中
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转换器中心
Jump straight into the specialized converter hubs for media, fonts, and curated document workflows.
视频转换器
Re-encode clips, movies, and exports across the site’s core video surfaces.
视频合并器
Combine multiple clips into one downloadable video without a watermark.
合并音频和视频
Add an audio track to video or choose the right audio and video merging tool.
视频压缩器
Reduce video file size with explicit presets, custom CRF, or an approximate target size.
视频变速器
Make videos faster or slower while preserving source dimensions.
音频转换器
Convert music, podcasts, and voice files between the most common audio formats.
图像转换器
Swap photo and design assets between web, print, and mobile-friendly image types.
字体转换器
Prepare fonts for desktop, web, and app delivery from one dedicated hub.
文档转换器
Browse curated document, text/data, and spreadsheet format hubs from one entry point.
Excel 到 CSV 转换器
将 XLSX 或 Excel 工作簿转换为 CSV 文件,用于数据库、应用程序和报告工作流。
免费 OCR 转换器
选择图像转文本 OCR 或可搜索 PDF OCR。
经过测试的文件转换指南
Read original tests from our conversion workers, including sample-file measurements, settings tradeoffs, compatibility limits, sources, authorship, and technical review.
MP3, FLAC, WAV, or AAC: a sample-file comparison
Review measured sizes, durations, and a lossless PCM hash check from one audio reference.
Read the test and findings →PDF to Word: what our layout fixture retained
See which header, table, page, and revision markers survived a PDF-to-DOCX reconstruction.
Read the test and findings →开发者工具
免费的浏览器原生开发者工具格式化JSON,产生哈希,UUID和密码,测试雷格斯,转换时间表,比较文本,编码URL,并创建或扫描QR代码和条码。
酒店查找
按日期、客人、设施、取消、可持续性、评级和价格比较当前酒店快照。
CSV 校验器
检查进口前的序列计算、头和分数。
Excel 到 CSV 转换器
将 XLSX 或 Excel 工作簿转换为 CSV 文件,用于数据库、应用程序和报告工作流。
首頁 〉外文書 〉文學 〉Skylite Viewer & Exporter
Inspect SQLite databases and export a selected table or view to complete CSV, JSONL or JSON.
在线条形码扫描器
从图片或摄像头读取产品、运输和资产条形码。
免费在线条形码生成器
创建 Code 128、EAN-13 和 UPC-A 条形码作为 PNG 或 SVG 文件。
在线 QR 码读取器
从屏幕截图、图像、粘贴、拖和下载或相机中阅读QR代码。
为什么选择Convertr？
Fast, secure, and easy-to-use file conversion with support for hundreds of formats.
闪电般快速
Convert files in seconds with our optimized conversion engine.
安全隐私
Your files are automatically deleted after conversion.
无需安装
Convert files directly in your browser without any software.
300+ 格式
Support for all popular audio, video, document, and image formats.
随处可用
Compatible with all devices and operating systems.
100% 免费
No hidden fees, no registration required, always free.
热门转换
快速访问我们最常用的文件转换
视频
视频编码转换器
将 AV1、VP9、H264、H265（HEVC）和 Apple ProRes 视频转换为兼容的 MP4 文件，便于在手机、浏览器、电视、剪辑软件中流畅播放和分享。
MP4 到 MP4 Converter
Re-encode a valid MP4 to rebuild metadata, use H264/AAC compatibility, compress it, or fix playback without changing the container.
网上视频编码器
Encode, transcode, or re-encode video online with MP4, H264, H265, AV1, VP9, and ProRes guidance.
ProRes 转 MP4 转换器
将 Apple ProRes MOV 母版转换为更小、更便于分享的 MP4 交付文件。
AV1 转换器
将 AV01 转换为 MP4, AV1 转換为 MP4 , H264 MP4, H265 MP4 或 WebM 从一个 AV1 的转换中心。
AV01 转 MP4 转换器
Convert AV1 or AV01 video in MP4, MKV, or WebM containers into a standard MP4 file.
VP9 转 MP4 转换器
将 VP9 WebM 或 MKV 视频重新编码为 MP4 文件，以获得更广泛的播放和上传兼容性。
AV1 转 H264 转换器
将 AV1 或 AV01 视频转换为兼容的 H264 MP4 文件。
AV1 转 H265 / HEVC 转换器
将 AV1 重新编码为 H265/HEVC，以更小的体积获得高效播放。
VP9 转 H264 转换器
将 VP9 WebM 视频转换为 H264 MP4，兼容更多设备。
H265 转 H264 转换器
Use this free H265 to H264 converter when you need to convert HEVC to H.264/AVC MP4 for phones, browsers, TVs, and editing apps.
HEVC to H264 Converter
Convert HEVC to H.264 online when the same H.265 compatibility workflow is named by its consumer codec term.
H264 转 H265 转换器
将 H264 MP4 重新编码为 H265/HEVC，在不损失画质的前提下缩小文件体积。
ProRes 转 H264 转换器
将 Apple ProRes 转换为 H264 MP4，便于通用播放与流媒体分享。
HEVC 转 MP4 转换器
Convert HEVC, H.265, or H265 video to a standard MP4 delivery file for easier playback and uploads.
MP4 转 MP3 转换器
从 MP4 视频文件中提取 MP3 音频，保留原始音质。
How to Convert Files Online with Convertr
在三个简单步骤中转换文件
1
上传您的文件
Drag and drop or click to select the file you want to convert.
2
选择格式
Select your desired output format from our extensive list.
3
下载
Click convert and download your converted file instantly.
常见问题解答
Everything you need to know about converting files with Convertr
Convertr supports 300+ file formats including audio (MP3, WAV, FLAC, M4A, AAC, OGG), video (MP4, MOV, AVI, WebM, MKV), images (JPG, PNG, WebP, HEIC, SVG), fonts (TTF, OTF, WOFF, WOFF2), and documents (PDF). You can convert between any supported format for free.
Yes, Convertr is 100% free. There are no hidden fees, no registration required, no watermarks, and no limits on the number of conversions. Simply upload your file, choose a format, and download.
You can upload files up to 1 GB in size. For best results with larger files, ensure you have a stable internet connection.
Yes. Your files are processed securely and automatically deleted from our servers after conversion. We never store, share, or access your files beyond the conversion process.
No. Convertr works entirely in your web browser. There is no software to download or install. It works on any device — desktop, tablet, or phone — with any modern browser.
Upload your video file (MP4, MOV, AVI, etc.) to Convertr, select MP3 as the output format, and click Convert. The audio track will be extracted and converted to MP3, ready to download in seconds.
Yes! Convertr easily converts HEIC/HEIF photos from iPhones to JPG, PNG, or any other supported image format for universal compatibility across all devices and platforms. 打开 HEIC 转 JPG 转换器
Yes, Convertr is fully responsive and works on any device with a web browser — iPhone, Android, iPad, or desktop. No app installation required.
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