Free online NBIB to RIS converter
Convert NBIB citation files to RIS for use in reference managers and databases.
Convert NBIB to RIS online - free
Your file is processed instantly and deleted as soon as you download it.
Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .nbib file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .nbib to .ris conversion
After successful file upload, click to convert when you are ready.
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Download converted .ris file
Conversion result is ready to download.
How to convert nbib to ris file
- Text files
- Rating: 2.8/5
Source format: NBIB
NBIB is a plain-text bibliographic format used mainly by PubMed and other NCBI tools to store citation records. It is commonly created when exporting search results from biomedical databases or saving references from PubMed. An NBIB file typically contains author names, article titles, journal information, abstracts, identifiers such as PMID, and other citation metadata. It is useful for moving references out of PubMed into citation managers or for archiving search results in a structured text form.
Target format: RIS
RIS is a widely supported plain-text citation exchange format used by many reference managers, library systems, and academic databases. Its main advantage is broad compatibility with tools such as EndNote, Zotero, Mendeley, and many journal submission systems. RIS uses a standardized tag-based structure for importing and exporting bibliographic records.
How to convert nbib to ris
The easiest way to convert .nbib to .ris is to use the built-in converter on 101convert.com. You can convert the file online for free without installing any software.
- Open the NBIB to RIS conversion page on 101convert.com.
- Upload your
.nbibfile. - Start the conversion.
- Download the resulting
.risfile.
If you prefer desktop software, you can also use a reference manager that supports both formats. For example, in Zotero, you can import the NBIB file and then export it as RIS using File → Export Library or File → Export Selected Items, depending on whether you want the whole library or only chosen references. In EndNote, you can typically import the NBIB file and then export the records as RIS through the file menu, depending on your version and installed import/export filters.
Compatibility and field mapping
NBIB and RIS are both metadata formats, so conversion usually preserves citation fields well, but not every field maps perfectly. Commonly preserved items include authors, title, journal, year, volume, issue, pages, DOI, and abstract. Less common fields such as grant information, publication types, or database-specific identifiers may vary by converter and reference manager.
Because both formats are text-based, the conversion does not change the underlying article content, only the citation metadata. If your NBIB file contains records from PubMed, the RIS output is generally suitable for importing into most reference managers. Still, it is a good idea to open the converted file in your target application and verify that the key fields imported correctly, especially if you rely on specialized metadata.
If you only need a quick conversion, 101convert.com lets you convert .nbib to .ris for free in your browser.
NBIB vs RIS: format comparison
How the NBIB and RIS formats compare on the properties that matter most for this conversion.
| Property | .NBIB PubMed / NCBI Bibliographic Citation file | .RIS Research Information Systems (RIS) bibliographic citation format |
|---|---|---|
| Editable text | Yes | Yes |
| Fixed page layout | No | No |
| Text formatting | Basic | None |
| Images | No | No |
| Interactive elements | No | No |
| Password protection | Not supported | Not supported |
| Opens in a web browser | No | No |
| Typical file size | Very small | Very small |
| Open standard | No | No |
| Best used for | Data exchange | Data exchange |
| Developer | National Center for Biotechnology Information (NCBI), U.S. National Library of Medicine | Research Information Systems, Inc. / later widely adopted by reference managers |
| MIME type | application/x-nbib | — |
Suggested software and links: nbib to ris converters
Frequently asked questions
Is the NBIB to RIS converter free?
Yes, converting NBIB to RIS on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my NBIB file be?
You can upload NBIB files up to 5 MB and convert up to 100 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert NBIB to RIS?
No. The NBIB to RIS conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid NBIB file for this NBIB to RIS conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.
Will converting NBIB to RIS lose citation information?
Core details such as title, authors, journal, dates, DOI, and identifiers usually transfer, but fields without a clear RIS equivalent may be omitted or mapped to a generic note field.
Are NBIB abstracts preserved when converted to RIS?
Abstracts are often preserved, but their destination depends on the RIS field mapping used by the receiving program. Some reference managers may ignore or display imported abstracts differently.
Why are some NBIB fields missing in my RIS file?
NBIB and RIS use different tag systems, so specialized PubMed fields such as publication types, indexing terms, or database-specific identifiers may not have a direct equivalent. The converter must either remap those fields or leave them out.
Will my converted RIS file import correctly into a reference manager?
It should import when the RIS tags are recognized, but unusual author formatting, missing publication dates, or unsupported fields can cause incomplete records. Check records with corporate authors, multiple identifiers, or incomplete NBIB metadata after import.