Free online ODS to BIB converter

Researchers often keep citation details in an ODS spreadsheet but need a BIB file for a LaTeX project or a bibliography manager. The conversion works best when each spreadsheet row is one reference and its columns identify bibliographic fields.

What the ODS format is

ODS (OpenDocument Spreadsheet) is an open spreadsheet format used for tables, formulas, and data. LibreOffice Calc and Apache OpenOffice Calc create ODS files; other spreadsheet programs can also open them. Citation lists, inventories, and other tabular records are common reasons to encounter one.

What the BIB format is

BIB files are plain-text bibliographies in BibTeX format. They store entries such as articles and books, with fields including author, title, year, and journal, and are used by LaTeX and bibliography managers. A BIB file is useful when references need to be cited by key and formatted by a bibliography tool.

How to convert ODS to BIB

Each ODS row must represent a reference, with column headers corresponding to BibTeX fields. A spreadsheet of unrelated data cannot be converted into meaningful bibliography entries just by changing its extension.

Online on 101convert.com

1. Open the ODS-to-BIB converter page on 101convert.com and upload the ODS file or files.
2. Start the conversion, then download the resulting BIB file or files.

The page supports batch conversion and displays a per-file size limit. Check the output entries and field values before using them; a file conversion alone does not confirm that spreadsheet columns were interpreted as the intended citation fields.

Offline with desktop software

LibreOffice Calc, available for Windows, macOS, and Linux, can export a sheet as CSV. A small Python script can then map those columns to BibTeX without uploading the data.

1. In Calc, make the first row the headers and use headers such as key, type, author, title, and year. Give every record a unique citation key; use BibTeX author formatting, such as Smith, Jane and Lee, Alex.
2. Select the bibliography sheet and choose File → Save As, then select CSV as the file type. If prompted, save the current sheet and choose UTF-8 encoding.
3. Save the following as ods_to_bib.py:

import csv, re, sys

source, destination = sys.argv[1:3]
def escape(value):
    replacements = {"\\": r"\textbackslash{}", "{": r"\{", "}": r"\}"}
    return "".join(replacements.get(char, char) for char in value.strip())

with open(source, newline="", encoding="utf-8-sig") as csvfile, \
     open(destination, "w", encoding="utf-8") as bibfile:
    for row in csv.DictReader(csvfile):
        key = (row.pop("key", "") or "").strip()
        if not key:
            continue
        entry_type = (row.pop("type", "") or "misc").strip() or "misc"
        if not re.fullmatch(r"[A-Za-z][A-Za-z0-9_-]*", entry_type):
            raise ValueError("Invalid BibTeX entry type: " + entry_type)
        fields = []
        for name, value in row.items():
            name = (name or "").strip().lower()
            value = (value or "").strip()
            if value and re.fullmatch(r"[A-Za-z][A-Za-z0-9_-]*", name):
                fields.append(f"  {name} = {{{escape(value)}}}")
        bibfile.write(f"@{entry_type}{{{key},\n" + ",\n".join(fields) + "\n}\n\n")

4. Run python ods_to_bib.py references.csv references.bib from a terminal in the folder containing the script and CSV. Python is available for Windows, macOS, and Linux.

Quality and compatibility

Confirm that entry types match the records—for example, article for a journal article—and that required fields are present. The script skips rows without a key and does not validate whether a field is appropriate for an entry type; inspect the resulting BIB file and test it with the bibliography tool you use. Accented characters and LaTeX-special characters may need adjustment for older BibTeX workflows.