About ConvertResize

One person, 40+ tools, no uploads

Who Makes This

Hi, I'm David. I run the Gauging Gadgets YouTube channel, where I've been publishing tech tutorials for years, and I build and maintain everything on this site myself. There is no team, no company, and no support department - if you email the site, I'm the one who reads it.

Many of the tools here started as a specific request from a viewer or a reader: someone wanted to make a photo collage without downloading an app, or size their own photo for a passport application without paying a service. The options I found wanted an upload, an account, or a watermark, so I built the version I wanted to exist. When you see a video tutorial embedded on a tool page, that's me walking through the tool I made.

How It Works

The file conversion and editing tools use modern web technologies like JavaScript, WebAssembly, and HTML5 APIs to process your files directly on your device - nothing gets uploaded to a server.

This covers all of the image, audio, and GIF tools - resizing, cropping, compressing, converting formats, editing GIFs, and more. Your files stay on your device throughout the entire process.

A few of the tools (like gaming ID lookups and YouTube Channel ID) do make server-side API calls to fetch public data from third-party services. These tools only send the username or ID you enter - never any files.

This approach means:

  • No File Uploads - Your images, audio, and GIFs are never sent to a server
  • Faster Processing - No upload/download waiting
  • No File Size Limits - Process files as large as your device can handle
  • No Queues - Never wait for server availability

The Tools

Image Tools: Resize, crop, compress, split, create favicons, build collages, and convert between formats including PNG, JPG, WebP, HEIC, PDF, SVG, and DDS.

GIF Tools: Create GIFs from video, add text and captions, trim frames, compress file size, resize dimensions, and convert GIFs to video.

Audio Tools: Convert between MP3, WAV, OGG, and M4A, compress audio, boost volume, trim clips into ringtones, and extract audio from video files.

Gaming Tools: Look up player IDs for Minecraft, Steam, and Roblox, or resolve Roblox asset and image IDs for scripting.

Utility Tools: Create password-protected ZIPs, convert ZIP formats, view file metadata, and more.

Everything works in any modern browser on phones, tablets, and computers. There is nothing to install.

How the Site Stays Free

ConvertResize is supported by ads. That's the whole business model: ads cover hosting and development, and the tools stay free for everyone with no premium tiers, no watermarks, and no accounts.

My Promise

  • Free forever - no premium tiers or paywalls
  • No accounts or logins required
  • No watermarks on your files
  • Privacy-first - file tools never upload your files to a server

Get In Touch

Have a suggestion, found a bug, or just want to say hi? Visit the Contact Page, or leave a comment on any Gauging Gadgets video. I read both.