Convert data sizes between bytes, KB, MB, GB, TB, and PB. Understand disk space and file sizes in different units. Input never leaves your device — everything runs locally in your browser.
Content reviewed October 2026 · About Toolzum
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results. Input never leaves your device — everything runs locally in your browser.
Convert between hundreds of units — length, mass, volume, temperature, area, speed, time, digital data, and more with a single click.
Convert lists between comma, newline, pipe, tab, semicolon, and space delimiters. Move data across tools without reformatting — free, local, no signup.
Convert screen sizes between inches, cm, resolution, and aspect — compare displays honestly. Check a 27-inch 4K pixel density — free, local, no signup.
Converts JSON files to CSV format — APIs, configuration files, and data exchange between web services to spreadsheets, database exports, and data imports. All conversion happens locally in your browser with no file size limits.
1 GB = 1,024 MB. This tool uses binary (base-1024) conventions, which is standard for computing and file systems.
Computers use binary addressing, so memory and storage are measured in powers of 2. 1 KB = 2^10 = 1,024 bytes. The decimal convention (1 KB = 1000 B) is used by some hard drive manufacturers.
A typical plain-text email is about 10 KB (10,240 bytes). With images or attachments, it can be much larger.
A typical HD movie is about 4–5 GB. A 4K movie can be 15–25 GB depending on length and compression.
Yes. All conversions run locally in your browser. No data is uploaded.