Skip to tool
All tools
FeuTex · free tools runs in-browser no bloat built by LiMiT

Online converter: convert video, images, audio and documents for free

This converter runs fully in your browser (no upload). It can re-encode images (PNG/JPG/WebP) and can convert any file (video/audio/documents too) to Base64, Data URL, or Hex for sharing, embedding, or debugging.

Category: Data · URL: /tools/online-converter-convert-video-images-audio-and-documents-for-free.html
Tip: For video/audio/document “conversion”, use Base64/Data URL/Hex. True transcoding (e.g., MP4→MP3) isn’t possible here without heavy codecs.
Current: 0.85
Transparent images become solid when converting to JPG.
Converted preview
For very large files, preview may be truncated; use “Download output text” when available.
Related tools:
Online Converter (Client‑Side) Online Converter (Base64/URL/HTML/JSON/Case/Slugs) XML Formatter Online Meta Checker Tool
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Pick what you want to convert, then download or copy the result.

  1. Select a mode (Image conversion, File → Base64/Data URL/Hex, or Text/Base64/Hex → File).
  2. Choose a file (for file modes) or paste input (for text modes).
  3. Click Convert.
  4. Use Copy for text output or Download for generated files.
Keywords this page targets (natural cluster): online converter free, convert video to base64, convert audio to base64, convert pdf to base64, convert document to base64, file to data url converter, file to hex converter, base64 to file converter, data url to file converter, hex to file converter, convert png to jpg online, convert jpg to webp online, convert webp to png online, image converter client side, offline file converter in browser, mp4 to data url, mp3 to data url, zip to base64, sha256 hash of file online, convert image format without upload
Secondary intents covered: Convert a video/audio/document file into Base64 for APIs or JSON payloads, Generate a Data URL to embed a file in HTML/CSS, Convert a binary file to Hex for debugging/forensics, Re-encode/convert an image to PNG/JPG/WebP (optionally resize and set quality), Decode Base64/Hex/Data URL back into a downloadable file, Compute a SHA-256 checksum of a local file (offline)

FAQ

Is this converter really free and offline?

Yes—conversion runs locally in your browser, so your files aren’t uploaded.

Can I convert MP4 to MP3 or change video codecs here?

No. This tool can convert any file to Base64/Data URL/Hex, but true media transcoding needs heavy codecs not included.

What image formats can I convert between?

You can re-encode images to PNG, JPG, or WebP (and optionally resize and set JPG/WebP quality).

How do I embed a file in HTML?

Use File → Data URL, then paste the result into an src attribute (images/video/audio) or CSS.

Can I turn a Base64 string back into a file?

Yes—switch to Text/Base64/Hex/Data URL → File, paste your input, and download the generated file.

Why is the output truncated?

Large outputs can be huge; the tool shows a preview to stay fast. Use Download output text for the full content.

Does it support PDF, DOCX, ZIP, or other documents?

Yes for Base64/Data URL/Hex conversion and decoding back to a file; it doesn’t edit document contents.