Numbered Citation Order Checker
Paste your paper and its numbered reference list to check that the numbers follow the order in which sources are first cited — as IEEE, Vancouver and AMA require — and to find references never cited and citations with no reference. When anything is out of order, you get a renumbering map and both the text and the list rewritten. Free, and nothing is uploaded.
Add the list to find references that are never cited and citations with no reference, and to get the list back in the new order.
Paste your paper’s text to check the order of its citations.
Everything runs in your browser — your text and references are not uploaded.
How to Use the Numbered Citation Order Checker
- Paste your text. The body of the paper with its citations — [1], [2–4], [1, 3, 5], (1) or superscript numbers.
- Add your reference list. It is optional, but with it the checker can find references never cited and citations with no entry, and give the list back in its new order.
- Check the citation format. Detect automatically reads the format your text uses most; choose another if it picks the wrong one.
- Copy the renumbered text and list. Paste them back into your document, then deal with anything the map marks as never cited or not in the list.
How Citation-Order Numbering Works
In the numbered styles, a source gets its number the first time it is cited and keeps that number every time it is cited again. The ICMJE recommendations behind Vancouver style ask for references numbered consecutively in the order in which they are first mentioned, and IEEE and AMA number the same way. So the first source you cite is 1, the next new source is 2, and the reference list, read from the top, meets the sources in the order a reader does.
Three things usually break the sequence: a paragraph moved earlier with its citations, so a high number now appears first; a reference deleted without renumbering, which leaves a gap; and a source added late and given the next free number at the end of the list.
| Citation form | Read as | Left alone |
|---|---|---|
| Square brackets | [1], [2–4], [1, 3, 5], [3, p. 5] (the locator is kept), and IEEE’s [1]–[4] | [Online], [sic] |
| Parentheses | (1), (2-4), (1, 3) | (2019), (n = 12), (p < .05) |
| Superscripts | ¹ ², ^1, and numbers pasted straight after a word or punctuation: shown.1,2 | p.5, Fig.3, 2.5, CO2 |
Numbers above 999 are never read as citations, so a year is never mistaken for one.
Worked Example
Try a sample loads a short IEEE-style paragraph and a six-item reference list. The checker finds 7 citations of 6 different references and reports three problems:
- Out of order: reference 5 is first cited before references 3 and 4, so it should be number 3.
- Not in the list: the text cites [7], but the list has no entry 7.
- Never cited: [6] is in the list but nowhere in the text.
The renumbering map moves 5 → 3, 3 → 4 and 4 → 5, gives the cited [7] the number 6, and sends the uncited [6] to the end as 7 — five references change number. In the rewritten text, [3, p. 4] becomes [4, p. 4], and the range [2]–[4] becomes [2], [4], [5] because its new numbers are no longer consecutive. The renumbered list leaves a gap at 6 — that is where the reference for the cited-but-missing source belongs.
Before You Paste the Result Back
- Citations in tables and figure legends. ICMJE numbers a reference cited only in a table or legend by where that table or figure is first mentioned in the text. Paste those citations at that point, or check them by hand.
- Repeated citations keep their number. Citing [2] again three pages later is correct; only first appearances set the order.
- IEEE ranges. The 2025 IEEE Reference Guide writes ranges out in full — [1], [2], [3], [4] rather than [1]–[4]. The checker keeps your own form and writes a range out only when the new numbers stop being consecutive.
- Mentions without a citation. A phrase such as “see reference 4” is not read as a citation, so search your text for it after renumbering.
- Reference managers. Zotero, EndNote and Mendeley renumber automatically from their field codes. This tool is for citations typed by hand, or a document whose field codes were lost.
Frequently Asked Questions
- What does numbered in order of first citation mean?
- The first source you cite is 1, the next source you cite for the first time is 2, and so on; a source cited again keeps its first number. The reference list then runs 1, 2, 3 in that order. IEEE, Vancouver and AMA all use this system.
- How do I renumber references after adding a new source?
- Paste the text and the list here: the map gives each old number its new one, every citation in the text is rewritten, and the list comes back in the new order. If your citations are managed by Zotero, EndNote or Mendeley, refresh them in the word processor instead — the manager renumbers them for you.
- What happens to a reference that is never cited?
- It is reported as never cited and moved to the end of the renumbered list. Numbered styles expect every listed reference to be cited in the text, so either cite it where it belongs or remove it.
- Can it read superscript citations?
- Yes: Unicode superscript digits (¹, ²), a caret (^1), and numbers pasted straight after a word or punctuation mark, which is how a superscript arrives as plain text (shown.1,2). To avoid misreading, digits after abbreviations such as p. and Fig., decimals, and formulas such as CO2 are not counted.
- Does IEEE allow citation ranges like [1]–[4]?
- The 2025 IEEE Reference Guide says ranges in the text no longer use an en dash: [1]–[4] is written [1], [2], [3], [4]. Some conference templates still use ranges, so follow the template you were given.
- Is my paper uploaded anywhere?
- No. The text and the reference list are read and rewritten in your browser; nothing is sent to a server.