SEERSeerKits

免費線上工具 每個文件

轉換、編輯、壓縮和管理影片、音訊、PDF、圖像和檔案格式 — 一切都在您的瀏覽器中進行。本地優先處理可確保您的文件的隱私。無需帳戶。

隱私第一

只要有可能,文件都會在您的瀏覽器中進行本機處理。沒有任何東西離開您的設備。

即時結果

無需上傳、無需排隊、無需等待。選擇文件後立即開始處理。

100% 免費

免費用於日常文件大小。升級到 Seer 應用程式以取得更大的檔案和批次。

Find a Tool

Search by tool name, file format, or keyword

流行工具

所有類別中最常用的工具

視訊工具
視訊轉換器
在瀏覽器中變更 MP4、MOV、WebM 和其他影片格式。本地優先處理可確保文件的隱私 — 對於最大 200 MB 的文件免費。
開啟工具 →
視訊工具
影片剪輯器
設定精確的入點和出點來修剪剪輯,而無需在可能的情況下重新編碼整個檔案。快速、私密且免費的日常編輯。
開啟工具 →
視訊工具
視訊壓縮器
減小電子郵件、訊息傳遞和網路上傳的影片檔案大小,同時保持可接受的品質。本地處理 — 無需註冊,200 MB 以下的文件免費。
開啟工具 →
視訊工具
視訊轉音訊
在幾秒鐘內從視訊檔案提取 MP3、AAC 或 WAV 音軌。非常適合播客、鈴聲和音樂剪輯 - 在支援時進行本地處理。
開啟工具 →
視訊工具
影片至GIF
透過大小和幀速率控制,將短視訊瞬間變成可共享的動畫 GIF。在您的瀏覽器中運行 - 對於 200 MB 以下的剪輯免費。
開啟工具 →
視訊工具
Merge Videos
Combine multiple video clips into one continuous file in the order you choose. Local-first merging keeps footage private — free for files up to 200 MB.
開啟工具 →
視訊工具
Crop Video
Remove unwanted edges and focus on the part of the frame that matters. Set crop dimensions visually — processed locally when ffmpeg.wasm is available.
開啟工具 →
視訊工具
Rotate Video
Turn video 90°, 180°, or 270° to fix orientation from phones and cameras. Quick correction without re-shooting — free for everyday clips.
開啟工具 →

Why SeerKits

Built for people who care about speed, privacy, and getting work done

Local-first Processing

Most tools run entirely in your browser using WebAssembly and native APIs. Your files stay on your device unless a specific job requires server assistance.

Fast & Free

No queues, no subscriptions for everyday tasks. Start processing immediately with generous free limits for personal and professional use.

Cross-platform

Works on Windows, macOS, Linux, iOS, and Android browsers. Need offline or batch workflows? Continue in the Seer app ecosystem.

Privacy by Design

We do not sell your files or use them for training. Clear upload boundaries, automatic deletion after server jobs, and transparent analytics only.

Privacy Promise

Your files deserve better than “trust us”

SeerKits is built on a simple principle: process locally whenever possible, be transparent when it is not, and never keep your files longer than necessary. No account is required for web tools, and we never sell your data.

Read our Privacy Promise

Local by default

When your browser supports the job, processing happens entirely on your device — nothing is uploaded.

Clear upload boundaries

Server-assisted tools show an explicit notice before any upload. You always know where your file goes.

Automatic deletion

Files used for server processing are deleted immediately after the job completes. We do not retain copies.

Seer App Ecosystem

Go beyond the browser

The Seer app family extends every SeerKits category with larger file limits, batch processing, offline workflows, and pro-grade controls — same privacy-first approach, more headroom.

Seer ConvertSeer VideoSeer AudioSeer PDFSeer ImageSeer File
Explore Seer Apps

Frequently Asked Questions

Common questions about SeerKits tools and privacy

Is SeerKits really free?
Yes. All web tools are free for everyday file sizes with no account required. The Seer mobile and desktop apps offer expanded limits, batch processing, and advanced options for power users.
Do you upload my files to a server?
Most tools process files locally in your browser. For jobs that require server assistance (such as certain codec conversions), you will see a clear notice before any upload. Server-processed files are deleted immediately after the job completes.
What file size limits apply on the web?
Each tool has its own free tier limit, typically up to 200 MB per file. Check the tool page for specific limits. For larger files or batch jobs, download the relevant Seer app.
Do I need to create an account?
No account is required to use any web tool. Account features will be available in a future update for saving preferences and accessing cross-device history.
Which browsers are supported?
SeerKits works best on the latest versions of Chrome, Firefox, Safari, and Edge. Local processing requires a modern browser with WebAssembly support.
Can I use SeerKits on mobile?
Yes. The website is mobile-friendly, and dedicated Seer apps for iOS and Android offer offline processing, larger file support, and batch workflows.
How is SeerKits different from other online converters?
We prioritize local-first processing, transparent privacy boundaries, and no forced sign-ups. You see exactly how each tool handles your file before you start.
What analytics do you collect?
We use Google Analytics 4 to understand aggregate usage patterns — page views, tool starts, and completion rates. We do not track file contents or personal file metadata.