The Merck Index provides a searchable reference for chemical substances by name or CAS Registry Number.
OneConverter
OneConverter provides conversion tools for work and study, with searchable pages for its available converters.
About OneConverter
OneConverter is a free, web-based multifunctional service that provides conversion tools for work, study, and personal use. It offers over 50,000 unit conversion tools for common measurements including length, weight, temperature, volume, and data storage, plus more than 10 PDF file tools for tasks such as format conversion, merging, splitting, compressing, and editing PDFs, with guaranteed accurate results for both professional and everyday use. The service is accessible from any device with an internet connection, uses SSL encryption for server communications, and automatically deletes uploaded files 3 hours after conversion to support user privacy. It claims a monthly uptime of over 99.5% and allows users to share converted files across devices, social networks, and cloud platforms via QR code or direct links.
Key features
- Over 50,000 unit conversion tools for common measurements
- 10+ PDF tools for format conversion, editing, and compression
- Completely free unlimited access to all conversion tools
- SSL encryption for all server communications
- Automatic deletion of uploaded files after 3 hours
- Cross-device file sharing via QR code or direct links
Best for: Students, professionals in engineering, finance, and science, and general users needing free unit or document conversion tools.
Good for
- Completely free unlimited access to all conversion tools
- Extensive tool library covering over 50K unit conversions and 10+ PDF functions
- Automatic deletion of uploaded files after 3 hours to support user privacy
Watch out for
- Uploaded files are automatically deleted after 3 hours if not downloaded
- Requires an active internet connection to use all tools
- Monthly uptime is stated as over 99.5%, not 100%
OneConverter at a glance
- Website
- oneconverter.com
- Type
- Website
- Pricing
- Free
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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OneConverter FAQ
How long are uploaded files stored on OneConverter's servers?
Uploaded files are automatically deleted 3 hours after conversion if not manually deleted by the user.
Is OneConverter free to use?
All conversion tools are completely free with no stated usage limits.
What devices are compatible with OneConverter?
The service works on any device with an internet connection, including Windows, Mac, and Linux systems.
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