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Convertto

100% free online local file conversion, no limits, no uploads.

Source Format
.ico

About ICO

The ICO format is a container file format specifically designed for Windows icons, launched with the first versions of Microsoft Windows in 1985. It allowed developers to pack multiple sizes of a single icon into a single file so the OS could display them beautifully on any screen resolution.

Today, ICO remains the industry standard for website favicons, which are the small branding symbols displayed in browser tabs. It can hold multiple BMP or PNG formats in various sizes, ranging from 16x16 pixels up to 256x256 pixels.

Output Format
.avi

About AVI

Introduced by Microsoft in 1992 as part of its 'Video for Windows' release, Audio Video Interleave (AVI) is one of the oldest container formats. It was created to pack audio and video streams together for smooth desktop playback on 16-bit computers.

While it has been superseded by more efficient formats like MP4, AVI is still widely used in legacy hardware devices and archiving due to its simple, uncompressed structures, though its files are often extremely large.

Format Comparison: ICO vs AVI

Side-by-side technical capabilities comparison between ICO and AVI files.

SpecificationICO DetailsAVI Details
Full NameIcon File FormatAudio Video Interleave
CategoryImageVideo
CompressionLossless or Lossy (PNG/BMP)None or Lossy
TransparencyYesNo
AnimationNoYes
Audio SupportNoYes (PCM, MP3, AC-3, etc.)
Video SupportNoYes
Metadata TagsNoYes (RIFF Info Tags)
Typical File SizeVery SmallLarge
Best Used ForWebsite favicons, desktop shortcutsLegacy devices, high-quality master copies

What happens during .ico to .avi conversion?

Our tool builds a video slideshow or a static video clip featuring your ICO image as the continuous visual frame, synced over a silent audio track, exporting it in the selected AVI format.

This conversion happens 100% locally in your browser. No files are uploaded to any server.

  • Audio Converter

    • Supports MP3, WAV, FLAC, OGG, AAC & M4A
    • Extract high-quality audio from any video file
    • Generate visual waveforms for audio-to-image

  • Video Converter

    • Transcode MP4, WebM, AVI, MOV & MKV
    • Advanced browser-based compression tools
    • Frame-accurate format conversion technology

  • Image Converter

    • WEBP, PNG, JPG, GIF, SVG, BMP, ICO & TIFF
    • Batch convert images to video slideshows
    • High-speed browser-native processing

  • Document Converter

    • Professional PDF to Video creation (10s per slide)
    • Secure DOCX to PDF & high-quality Image exports
    • Local-first Image to PDF batch compilation

  • Privacy & Security

    • 100% local processing—files never leave your PC
    • Browser-sandboxed for maximum data security
    • No server storage, data logging, or tracking

  • Unlimited & Local

    • No subscription or daily conversion limits
    • Works on Windows, macOS, Linux & Mobile
    • Convert up to 30 files in a single local batch

Frequently Asked Questions

Everything you need to know about our secure file converter.

Are my files uploaded to a server?
No. Your files never leave your computer. Free Convert To uses browser-native technology (WebAssembly + FFmpeg) to process everything locally. This ensures your data remains 100% private and secure.
Do I have to sign up or create an account?
No! Free Convert To is completely open and accessible to everyone. There is no sign up, no email required, and no account creation. You can start converting files immediately.
Are there any file size limits?
We do not impose any artificial file size limits. Since the conversion happens locally on your device, the only limit is your available system RAM.
What file formats are supported?
We support a comprehensive list of formats.
  • Audio: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS.
  • Video: MP4, WebM, AVI, MOV, MKV, GIF.
  • Image: WEBP, PNG, JPG, JPEG, SVG, BMP, ICO, TIFF, HEIC.
  • Document: PDF, DOCX.
Can I convert PDF to video?
Yes! You can convert any PDF document into a video file. Our tool will automatically treat each page as a slide and assign it a 10-second duration in the resulting video.
Can I convert DOCX to PDF or Images?
Absolutely. You can convert Microsoft Word (DOCX) files to high-quality PDF documents or extract the pages as individual images, all within your browser.
Can I convert image to audio?
Yes! You can convert any static image into an audio file. The tool will use your image as the album art for the resulting audio track.
Can I convert video to image?
Yes! You can extract high-quality frames from any video file and save them as images (PNG, JPG, WEBP), or convert short clips into animated formats like GIF.
Can I convert audio to image?
Yes! Our tool can analyze your audio file and generate a professional visual waveform, which is then saved as a high-resolution PNG or JPG image.
Can I convert video to audio?
Absolutely. You can extract the original audio track from any video file and save it in formats like MP3, WAV, or FLAC without any quality loss.
Can I convert multiple files at once?
Yes! You can drag and drop multiple files to batch process them. Our tool supports converting up to 30 files in a single session.
How many conversions can I do per day?
There are no limits. You can perform as many conversions as you need, 24/7. We do not have any daily, hourly, or monthly caps.
Does it work offline?
Once the initial page and conversion engine are loaded, the actual file processing happens entirely on your local machine. This means you don't need a constant high-speed connection while your files are being converted.
Is my data shared with third parties?
Never. Because your files are never uploaded to any server, it is physically impossible for us or any third party to access, see, or share your data.
What happens to my files after conversion?
Your files remain exactly where they are—on your computer. We don't store them, so there is no need to 'delete' them from our side. Once you close the tab, all temporary processing data is wiped from your browser's memory.

Loved by users worldwide

Join thousands of people who convert their files securely every day.

"Finally a converter that doesn't ask for my email! Super fast and the privacy factor is huge for me."

Sarah J.
Sarah J.Graphic Designer

"The video to audio extraction is flawless. I use it for my podcast clips every day."

Mark T.
Mark T.Content Creator

"I was skeptical about 'browser-only' conversion but it handled my 500MB video without a hitch."

Elena R.
Elena R.Software Engineer

"The UI is so clean. No ads popping up everywhere, just a solid tool that works."

David W.
David W.Marketing Manager

"Converting HEIC to JPG for my work projects is now a one-click task. Highly recommended!"

Chloe M.
Chloe M.Photographer

"Batch processing 20 files at once saved me so much time. Truly unlimited."

James L.
James L.Video Editor

"Great tool, would love to see more obscure audio formats added in the future, but for 99% of tasks it's perfect."

Alex K.
Alex K.Student

"Very fast and secure. Sometimes the first load takes a few seconds but once it's ready it's instant."

Maria S.
Maria S.Freelancer