ProofreaderPro.ai

Free In-Text Citation Fixer and Converter

Get every in-text citation right in one pass. Paste up to 500 words and each parenthetical and narrative citation is corrected and converted to APA 7, MLA 9, Chicago author-date or Harvard: commas, ampersands, et al., page forms, ordering and combined citations, with every change listed and explained. Authors, years and pages only ever come from your text.

Paste or type your text, then run the tool. Results appear below in seconds.

0 / 500 words
Convert citations to
(Smith & Jones, 2020, p. 15)
Create a free account to run itSign inFree accounts include 2 runs a day
Every change listed with the rule behind it2 free runs a day with a free account
Academic researcher using ProofreaderPro.aiAcademic researcher using ProofreaderPro.aiAcademic researcher using ProofreaderPro.aiAcademic researcher using ProofreaderPro.aiAcademic researcher using ProofreaderPro.ai
84,000+
International Researchers
4.8
Average Rating

Trusted by researchers publishing in

ElsevierSpringer NatureWileyCambridge University PressOxford University PressTaylor & FrancisSAGE PublishingIEEEMDPI

How to fix your in-text citations in three steps

01

Paste your text

Body text with its citations, up to 500 words: the literature review with three citation styles in it, the section a co-author drafted, the paragraph the journal flagged.

02

Pick the target style

APA 7, MLA 9, Chicago author-date or Harvard. Every citation is found, fixed and converted to that style's rules: comma use, and versus ampersand, et al. thresholds, page forms and ordering.

03

Review each change

Every fix is listed with the original wording, the new form and its reason. A citation missing something the style needs is flagged with what to add, never silently completed.

Why writers fix citations here

Four target styles

APA, MLA, Chicago author-date and Harvard, each applied with its own comma, ampersand, et al. and page rules rather than a one-size template.

Nothing invented

A rule-based gate rejects any output whose citations use a surname or year not present in your text; missing details are flagged, not filled in.

Every fix explained

Each change names its rule, so the pass doubles as a working reference for the style you are converting into.

Prose left alone

Only the citations change. Your sentences, quotations and any reference-list entries come out exactly as you wrote them.

In-text citations: small marks, strict rules, frequent mistakes

In-text citations are the most rule-dense strings in academic writing. APA wants a comma between author and year, Chicago author-date forbids it, and MLA replaces the year with a page. The ampersand is correct inside APA parentheses and wrong in APA narrative citations, wrong everywhere in Harvard. APA abbreviates three authors to et al. from the first citation, Chicago and Harvard wait for four. Multiple works in one parenthesis are ordered alphabetically in APA and separated by semicolons everywhere. No single rule is hard; the density is the problem, and it is why in-text errors survive proofreading that catches everything else.

Mixed styles usually arrive innocently. A paragraph pasted from an earlier paper written for a different journal, a co-author trained on Harvard while the target is APA, a note taken from a source that cited in MLA. The fixer reads each citation, applies the target style's rules, and lists every change with its reason, which makes the review fast: you check a list of citations rather than re-reading the section. The classic mechanical slips, et. al. with the stray period, pg. for p., two adjacent parentheses that should be one citation, are corrected in the same pass.

The rule that matters most is the negative one: nothing gets invented. An in-text citation is a pointer to a real entry in your reference list, so the output is gated by a check that every surname and year in the converted citations already appears in your text, and a citation lacking a detail the target style wants, like the page MLA expects, is flagged with what to add instead of being quietly completed. The reference list itself is the other half of a style switch: the reference format converter rebuilds it entry by entry from real database records, and the AI citation checker verifies that the entries themselves exist before you convert anything.

For building new citations rather than fixing existing ones, the citation generator produces both the reference entry and its matching in-text forms in seven styles, and the DOI to citation converter does the same straight from identifiers. When the whole manuscript needs the pass, the ProofreaderPro editor proofreads complete documents with tracked changes and treats citations as protected content.

Example: four citation problems, fixed for APA 7

A passage with the classic slips: a missing comma, the wrong conjunction and ordering, a broken et al., a nonstandard page abbreviation and two citations that belong together. The APA 7 result in tracked changes, with each fix explained below.

You paste

Prior work has shown mixed results (Smith 2020; Jones and Brown 2018). Chen et. al. (2021) reported a similar pattern, and the effect was replicated (Lee, 2022, pg. 143). Earlier reviews agreed (Taylor, 2015)(Nguyen, 2017).

The APA 7 version

Prior work has shown mixed results (Smith 2020; Jones and Brown 2018Jones & Brown, 2018; Smith, 2020). Chen et. al. al. (2021) reported a similar pattern, and the effect was replicated (Lee, 2022, pg.p. 143). Earlier reviews agreed (Taylor, 2015)(Nguyen, 2017Nguyen, 2017; Taylor, 2015).

What changed, and why
  • Comma + order"(Smith 2020; Jones and Brown 2018)" becomes "(Jones & Brown, 2018; Smith, 2020)"
    APA separates author and year with a comma, uses the ampersand inside parentheses, and orders multiple works alphabetically by first author.
  • Et al."et. al." becomes "et al."
    Et is a complete Latin word and takes no period; only al. is an abbreviation. The narrative citation form is otherwise already correct.
  • Page form"pg. 143" becomes "p. 143"
    APA abbreviates a single page as p. and a range as pp.; pg. is not an APA form.
  • Combined"(Taylor, 2015)(Nguyen, 2017)" becomes "(Nguyen, 2017; Taylor, 2015)"
    Works cited at the same point share one parenthesis, separated by semicolons and ordered alphabetically.

Every author and year in the output already appears in the input; the fixer reorders, punctuates and combines, and flags anything missing rather than inventing it.

In-text citation fixer FAQs

What kinds of in-text citation problems does it fix?
The recurring ones: a missing comma between author and year in APA and Harvard, an extra one in Chicago and MLA, and versus ampersand in the wrong position, et. al. with the stray period (et is a whole Latin word; only al. abbreviates), pg. instead of the style's page form, adjacent citations that should share one parenthesis, multiple works in the wrong order inside a parenthesis, and citations left in a different style than the rest of the text. Each fix is listed with the original wording, the corrected form and the rule behind it.
Which styles can it convert citations into?
APA 7, MLA 9, Chicago author-date and Harvard (Cite Them Right), the four styles whose in-text citations are built from the author name plus a year or page. Converting to the numbered styles, IEEE and Vancouver, needs your reference list and the order of first mention to assign the numbers, which is document-level work: the full editor handles complete manuscripts with their reference lists.
What happens when a citation is missing something the target style needs?
The missing piece is named, not filled in. MLA cites pages rather than years, so converting (Smith, 2020) to MLA without a page in your text produces (Smith) plus a note saying the page number needs to be added from your copy of the source. The same applies to missing years and author names: an in-text citation is a claim about a source, so every author, year and page in the output must come from what you wrote.
Does it change my reference list or quoted material?
No. The tool works on body text: citations inside direct quotations stay exactly as the quoted author wrote them, and reference-list entries pasted along with the text are left as written. To convert the reference list itself between styles, use the reference format converter, which rebuilds each entry from its database record; the two tools together cover both halves of a style switch.

Citations fixed. Now polish the writing around them.

The ProofreaderPro editor proofreads your full manuscript with tracked changes you approve line by line, treating your citations as protected content. Built for researchers, free to try.

Proofread my paper free
More free tools:Citation GeneratorAPA Citation GeneratorMLA Citation GeneratorChicago Citation GeneratorHarvard Referencing GeneratorIEEE Citation GeneratorVancouver Citation GeneratorAI Citation GeneratorChatGPT Citation GeneratorClaude Citation GeneratorGemini Citation GeneratorAI Citation CheckerCitation FinderJournal FinderDOI to Citation ConverterBibTeX GeneratorReference Format ConverterReference AlphabetizerAnnotated Bibliography GeneratorTitle Case ConverterAll Free ToolsAI Proofreader
From our blog:APA vs MLA vs Chicago vs IEEE: Which Citation Style Do You Need?APA 7 Citation Guide for Academic Writing12 Grammar Mistakes That Get Research Papers Rejected

Ready to polish your next paper?

Proofread, humanize, paraphrase and translate your academic writing in one place. Free to start, no credit card required.

Get Started Free
Proofreader Pro AI
Refine your research with ProofreaderPro.ai, the world's leading AI-powered proofreader, tailored for academic text.
ProofreaderProAI, Greenleaf Ave, Staten Island, 10310 New York
Ā© 2026 ProofreaderPro.ai. A leading academic proofreader, editor & humanizer. Made with ā¤ļø and linguistically sound syntax 🌳s