About File Size Converter
Use this free bytes when you need size without installing extra CLI tools. Convert between bytes, KB, MB, GB, TB, KiB, MiB, GiB. Includes download time estimates. Because processing never leaves your browser, it is a safer default for private payloads, tokens, and unpublished configs. Jump to related converters tools in the same workspace when you are done.
What stays local: Inputs you process with File Size Converter.
What you can do with File Size Converter
- Free online file size converter — no account required
- Convert Size formats quickly for development workflows
- Runs locally in your browser (nothing uploaded for processing)
- Works offline after installing the DevTooKit PWA
How to use File Size Converter
- Open File Size Converter. Go to the free File Size Converter page on DevTooKit.
- Enter your input. Paste or type your size data — it stays in this browser tab.
- Run the tool. Use File Size Converter to get results instantly with no server round-trip for processing.
- Copy and continue. Copy the output into your editor, PR, or API client as needed.
Privacy
What stays local: Inputs you process with File Size Converter. DevTooKit is local-first — no signup wall, no server-side processing for this tool, and no watermark on results.
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FAQ — File Size Converter
Privacy, offline use, and how this free online tool works.
Does File Size Converter upload my data to a server?
No. File Size Converter runs in your browser. Your input stays on this device and is not sent to DevTooKit for processing.
Is File Size Converter free?
Yes — free, with no account and no paywall to use the core size workflow.
How accurate is File Size Converter?
It uses well-known client-side libraries and browser APIs. Unusual edge-case formats may still need a manual check.
Can I use File Size Converter offline?
Yes after the first visit. Install DevTooKit as a PWA and this tool keeps working without a network connection.