Free Online Tools for Every File

Convert, edit, compress, and manage video, audio, PDF, image, and file formats — all in your browser. Local-first processing keeps your files private. No account needed.

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Privacy First

Files are processed locally in your browser whenever possible. Nothing leaves your device.

Instant Results

No uploads, no queues, no waiting. Start processing the moment you choose a file.

100% Free

Free for everyday file sizes. Upgrade to the Seer app for larger files and batch processing.

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Search by tool name, file format, or keyword

Popular Tools

The most used tools across all categories

Video Tools

Video Converter

Change MP4, MOV, WebM, and other video formats in your browser. Local-first processing keeps files private — free for files up to 200 MB.

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Video Tools

Video Cutter

Set precise in and out points to trim clips without re-encoding the entire file when possible. Fast, private, and free for everyday edits.

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Video Tools

Video Compressor

Reduce video file size for email, messaging, and web uploads while keeping acceptable quality. Process locally — no signup, free for files under 200 MB.

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Video Tools

Video to Audio

Pull MP3, AAC, or WAV audio tracks from video files in seconds. Ideal for podcasts, ringtones, and music clips — processed locally when supported.

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Video Tools

Video to GIF

Turn short video moments into shareable animated GIFs with size and frame-rate controls. Runs in your browser — free for clips under 200 MB.

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Video Tools

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.

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Video Tools

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.

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Video Tools

Rotate Video

Turn video 90°, 180°, or 270° to fix orientation from phones and cameras. Quick correction without re-shooting — free for everyday clips.

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Video Tools

Convert, trim, compress, and extract content from video files — processed locally in your browser whenever possible. No account required.

View all 17 tools

Video Converter

Change MP4, MOV, WebM, and other video formats in your browser. Local-first processing keeps files private — free for files up to 200 MB.

Open tool →

Video Cutter

Set precise in and out points to trim clips without re-encoding the entire file when possible. Fast, private, and free for everyday edits.

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Video Compressor

Reduce video file size for email, messaging, and web uploads while keeping acceptable quality. Process locally — no signup, free for files under 200 MB.

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Video to Audio

Pull MP3, AAC, or WAV audio tracks from video files in seconds. Ideal for podcasts, ringtones, and music clips — processed locally when supported.

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Video to GIF

Turn short video moments into shareable animated GIFs with size and frame-rate controls. Runs in your browser — free for clips under 200 MB.

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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.

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Audio Tools

Convert, trim, merge, and adjust audio tracks with local-first processing. Keep your recordings private and download results instantly.

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Audio Converter

Switch between MP3, WAV, FLAC, AAC, and more without installing software. Local processing protects your recordings — free for files up to 100 MB.

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Audio Cutter

Slice songs, podcasts, and voice memos to exact timestamps. Waveform preview and local processing — free, no account required.

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Audio Merger

Combine multiple tracks into one seamless file in the order you choose. Local merging keeps your library private — free for everyday playlists.

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Audio Speed Changer

Speed up or slow down playback from 0.5× to 2× while optionally preserving pitch. Great for study, practice, and content review — runs locally.

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Change Audio Volume

Boost or reduce audio volume from 0% to 300% using WebAudio processing. Export as WAV — fast, local, and free for files up to 100 MB.

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Change Audio Pitch

Shift pitch up or down while optionally preserving tempo. Useful for voice effects, music practice, and creative sound design.

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PDF Tools

Merge, split, compress, and convert PDF documents without leaving your browser. Ideal for quick office tasks with zero upload when local processing is available.

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PDF Merger

Combine multiple PDFs into one document in the order you arrange. Local merging keeps contracts and reports off third-party storage — free for small files.

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PDF Splitter

Extract page ranges or split every page into separate files. Fast local splitting for invoices, chapters, and scanned batches — no account needed.

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PDF Compressor

Shrink PDF file size for email and uploads by optimizing images and streams. Local compression where supported — free tier for documents under 50 MB.

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PDF to Image

Export PDF pages to JPG or PNG for slides, thumbnails, and social previews. Renders locally in your browser — free for documents under 50 MB.

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Image to PDF

Turn JPG, PNG, and WebP photos into a single PDF portfolio or multi-page scan. Local assembly — free for small batches, no account required.

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PDF to JPG

Export PDF pages as JPG images for slides, thumbnails, and sharing. Renders locally in your browser — free for documents under 50 MB, no account required.

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Image Tools

Convert and compress images in common formats with fast, private processing. Perfect for web uploads, social posts, and lightweight sharing.

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Image Converter

Switch between JPG, PNG, WebP, and GIF without desktop software. Local conversion protects screenshots and assets — free for images up to 25 MB each.

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Image Compressor

Reduce JPG, PNG, and WebP weight for faster sites and smaller attachments. Visual comparison slider included — local processing, free for everyday use.

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Image Resizer

Change image width and height for web, social, or print without desktop software. Local Canvas processing — free for images up to 25 MB each.

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Image Cropper

Trim photos to exact regions for thumbnails, profile pictures, and social crops. Interactive selection coming soon — free for images up to 25 MB.

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Image Rotate

Fix sideways phone photos or fine-tune orientation by degrees. Local Canvas rotation — free for images up to 25 MB each.

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Image Flip

Mirror photos horizontally or vertically for design layouts and selfie fixes. Local Canvas flip — free for images up to 25 MB each.

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File Tools

Compress folders into archives, extract packages, verify file integrity, and batch-rename files — utility tools built for everyday workflows.

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File Archive

Bundle files into ZIP or unpack archives without installing utilities. Runs locally when supported — free for archives under 500 MB total.

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File Hash

Compute SHA-256, SHA-1, and MD5 checksums to verify downloads and detect duplicates. Purely local — files never leave your browser.

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File Compressor

Bundle documents, images, and folders into a single ZIP archive without desktop utilities. Local JSZip compression — free for archives under 500 MB total.

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File Extractor

Unpack ZIP files and download individual contents without installing archive software. Local extraction — free for archives under 500 MB.

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Base64 Encoder

Convert files or text to Base64 and back for APIs, data URIs, and debugging. Purely local FileReader processing — free with no upload.

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QR Code Generator

Create scannable QR codes from URLs, text, or contact info. Encoder library integration coming soon — free and local.

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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.

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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.

Browse by Category

Find the right tool for every file type

Video Tools

17 tools

Audio Tools

10 tools

PDF Tools

18 tools

Image Tools

10 tools

File Tools

7 tools

Converters

12 tools