Are my files uploaded to a server when I convert them?

For image, document, PDF, and text conversions, everything happens locally in your browser — your files are never uploaded to any server. Video and audio conversions use FFmpeg compiled to WebAssembly, which also runs entirely in your browser. Your files stay on your device at all times.

What file formats can I convert?

Images: JPG, PNG, WebP, GIF, BMP, ICO, PDF. PDFs: TXT, HTML, Markdown, JPG, PNG. Documents (DOC, DOCX): PDF, HTML, Markdown, TXT. Spreadsheets (XLS, XLSX): CSV, HTML, PDF, TXT. Video: MP4, WebM, AVI, MOV, MKV, GIF. Audio: MP3, WAV, OGG, AAC, FLAC, M4A.

How do I convert a PDF to Word or text?

Upload your PDF file, then select TXT or HTML as the output format. The converter extracts all text content from the PDF and saves it as a plain text or HTML file. For PDF to editable Word format, select HTML which can be opened in Word and saved as DOCX.

How do I convert JPG to PNG or PNG to JPG?

Upload your JPG or PNG image, select the target format (PNG or JPG) from the dropdown, and click Convert. The conversion happens instantly in your browser. Note: converting PNG to JPG removes transparency — a white background is added automatically.

Is there a file size limit?

For image and document conversions there is no server-side limit since everything runs in your browser. For video and audio conversions using FFmpeg WebAssembly, very large files (1 GB+) may be slow depending on your device. Most typical video files under 500 MB convert without issues.

Can I convert a PDF to multiple images at once?

Yes. When you upload a PDF and select JPG or PNG as the output format, each page is converted to a separate image. All images are automatically packaged into a ZIP file for download. You can also upload all images directly to your Culacc cloud storage.

How do I convert video to MP4 or GIF?

Upload your video file (MP4, WebM, AVI, MOV, MKV), select MP4 or GIF as the output format, and click Convert. Video conversion uses FFmpeg WebAssembly running in your browser — no server upload needed. GIF conversion automatically applies frame rate optimization for smaller file sizes.

Do I need an account to convert files?

No account is required. The file converter is completely free without any signup. If you want to save converted files to cloud storage and access them from any device, you can create a free Culacc account with 5 GB of storage.

50+ Format Combinations · Free · No Signup

Free Online
File Converter

Convert images, PDFs, documents, video, and audio between 50+ formats. Most conversions happen directly in your browser — your files never leave your device.

Browser-based — never uploaded

No account needed

50+ format combinations

PDF, Image, Video, Audio

🖼️ JPG → PNG

🖼️ PNG → WebP

📄 PDF → TXT

📄 PDF → JPG

🖼️ Image → PDF

🎥 MP4 → WebM

🎥 Video → GIF

🎵 MP3 → WAV

🎵 WAV → MP3

📝 DOCX → PDF

⚡ File Converter

Images, PDFs, Documents, Spreadsheets, Video, Audio · Browser-based processing

📁

Drop your file here

Images, PDFs, Documents, Video, Audio

Automatic format detection

Converting...

🔒

Your Files Are Processed Locally — Never Uploaded

All image, document, PDF, and text conversions run entirely in your browser using JavaScript and WebAssembly. Video and audio conversions use FFmpeg compiled to WebAssembly — also running entirely in your browser. Your files never leave your device, are never stored on any server, and are never analyzed or shared. This is fundamentally different from most online converters that require a server upload.

How to Convert Files

Convert any file in 3 steps

No software to install. Works on any device. Automatic format detection.

Upload your file

Drag and drop or click "Browse File." The converter automatically detects the file type and shows all available output formats.

Choose output format

Select the format you want to convert to. All compatible formats for your file type are shown — no guessing needed.

Download converted file

Click Convert. The result is ready in seconds. Download it directly or save it to your Culacc cloud storage.

Supported Formats

What can you convert?

🖼️ Images

↕ also convert to PDF

📄 PDF

↕ multi-page → ZIP

📝 Documents

DOC, DOCX, RTF, ODT

📊 Spreadsheets

XLS, XLSX, ODS

🎥 Video

FFmpeg WebAssembly

🎵 Audio

FFmpeg WebAssembly

Why Browser-Based File Conversion is Better

Most online file converters upload your file to a remote server, convert it there, and send it back. This means your files — which may contain sensitive personal data, business documents, or private photos — pass through a third party's infrastructure.

Culacc's file converter uses WebAssembly (WASM) — a technology that compiles native tools like FFmpeg and PDF libraries to run directly in your browser at near-native speed. Image, document, and PDF conversions use optimized JavaScript libraries. Video and audio conversions use FFmpeg compiled to WASM, the same tool used by professional video editors, running entirely locally.

The result: your files stay on your device, conversions are fast, and there are no file size restrictions imposed by server-side quotas.

⭐⭐⭐⭐⭐

4.8 out of 5 — rated by 2,134 users

FAQ

Frequently asked questions

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Store your converted files in the cloud

Culacc gives you 5 GB free cloud storage. Upload, organize, and share your converted files from any device.

Create Free Account — 5 GB Storage

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