For seniors about to click submit
Common App Checklist Before You Submit
A checklist of the real problems in your Common App and supplements, from another college's name to a typo, each quoted with its fix.
Free to start. No card needed.
How to check your Common App before you submit
Read the preview, not the boxes you typed in. Once every required question is answered, Common App lets you preview the whole application1 as a PDF. Print it or open it on a different screen, then read each answer out loud, slowly. A missing word or a slip from copying and pasting is easier to hear than to see. Check that each answer ends on a complete sentence, keeps its paragraph breaks and has no odd symbols, such as ’ where an apostrophe belongs.
Next, test the application against itself. For each college, search its answers for the other schools on your list and their mascots, towns and best-known programs, starting with any reused “why us” answer. Then find every number, date and title from your activities in your essays. If one says 14 students and another says twenty, a reader can't tell which is true. Check, as well, that no two answers a college reads tell the same story.
Finally, cover what the preview leaves out. If a college has a Writing Supplement, it isn't in the PDF; you review and submit it separately2, once your Common App to that college is in. Ask someone you trust to read everything once more, then submit a day or more early, in case of a payment or upload problem. Deadlines are in your local time zone3. Once you submit to a college, that application can't be changed4, though you can still edit it for colleges you haven't submitted to.
Common App 2026–27
The Common App checklist, part by part
Check each part against its limit, then for the slip most likely to hide there. Each college sets the limits for its own questions.
| Part | Limit | Check before you submit |
|---|---|---|
| Personal essay | 250 to 650 words | Paragraph breaks intact, last sentence complete, no other college named |
| Activities and experiences | Up to 10. Position or leadership 50 characters, organization name 100, description 150 | Every number, date and title matches your essays |
| Additional information | 300 words, optional | Context nothing else gives, not a second essay. See what belongs there |
| Challenges and circumstances | 250 words, optional | The circumstance and how it affected you, not repeated elsewhere |
| Each college's questions | Set by the college | That college's name, programs and town, and no one else's |
| Writing Supplement | Set by the college | Not in the preview, so check your drafts on their own |
Activity limits are from Common App's September 2026 activities guide; its 2026–27 counselor update announced the new section name and kept the limits. The optional questions' limits are from its February 2025 announcement, and the essay range from the University of Illinois's essay page. Checked October 29, 2026.
How it works
How does River check your Common App?
Start by saving your Common App preview PDF for one college. Drop it here with that college's supplement drafts, up to 10 files in all, or paste your answers as text. River reads everything together, along with anything already in your River workspace, such as an activities list or earlier drafts. If a file is cut off or unreadable, River says so at the top of your checklist and checks what did arrive.
River counts every limited field one by one, from the 150 characters an activity description allows to each essay's word count. It compares every number and date that appears in more than one place, such as “14 students” in an activity and “twenty kids” in an essay. When two facts disagree, it quotes both and asks which is true instead of guessing. It also notes which college each answer is for, so it can flag another college's name.
Your checklist lands in a doc, worst first, from critical problems to formatting, then anything worth adding. Each item quotes your words, says where they are and gives the fix. Corrected passages follow, ready to paste, then the checks your files can't show, such as reviewing a Writing Supplement. Buttons at the end let you apply every fix, draft your Additional information or check another college. A long answer can go to the essay shortener, and a thin “why us” answer to the why this college essay writer.
How it works
From your PDF to a clean application
Save your preview
Answer every required question, then open the Common App preview for one college and save the PDF.
Drop everything in
Add the PDF and that college's supplement drafts, up to 10 files, or paste your answers instead.
Get your checklist
River lists the problems it finds, worst first, each quoted with where it is and the fix.
Fix and submit
Paste the corrected passages back in, preview the PDF again, then submit, ideally a day early.
Final check · Cornell application · example
- Critical · Cornell supplement, paragraph 2: “join the Penn community” names another college
- Critical · Supplement 2 stops mid-sentence: “and that's when I”
- High · Activity 3 says “14 signed up”, your essay says “twenty kids”
- Medium · Personal essay, paragraph 4: “it's gears” should be “its gears”
- Formatting · Supplement 1: “don’t” where an apostrophe was pasted
What you'll get
Wrong college names, cut-off answers and mismatched numbers, caught before you submit
- Every real problem quoted exactly, with where it is and how to fix it
- The worst first: a wrong college name or a cut-off answer before a stray comma
- A corrected version of every flagged passage, ready to paste back in
Before and after
Your application in. A checklist of real problems out.
Common App preview PDF and two Cornell supplements. Activity 3 · Founder & Teacher, Coding Club, Elm Street Library: Started free Scratch coding club for middle schoolers at public library; 14 signed up in 1st yr. Personal essay, paragraph 3: …by October, twenty kids were crowding around four library laptops… Cornell supplement, paragraph 2: …That is why I can't wait to join the Penn community and keep teaching…
Final check Read: Common App preview PDF and two Cornell supplements. 5 issues: 2 critical, 1 high, 1 medium, 1 formatting. Fix before you submit ☐ Critical · Cornell supplement, paragraph 2: “join the Penn community”. Names another college. Fix: “join the Cornell community”. ☐ High · Activity 3 and personal essay, paragraph 3: “14 signed up” and “twenty kids”. The numbers disagree. Fix: use the true number in both. Which is it? Corrected passages Cornell supplement, paragraph 2: That is why I can't wait to join the Cornell community and keep teaching…
Every issue quotes your own words and says where they are. Facts River can't confirm become a question, never a guess.
What lands in your doc
What your final check covers
- Another college's name, program or mascot left in an answer meant for a different school
- Answers over their limit, with the exact count, plus any left blank or cut off mid-sentence
- Numbers, dates and names that don't match between your activities, essays and supplements
- The same story used twice in answers one college reads, so each answer shows something new
- Typos, pasting damage and forgotten notes like “fix later,” quoted exactly with the corrected sentence
- Empty optional sections worth using, like Additional information, drafted only from your own facts
Questions applicants ask
Common questions
What are the most common mistakes on a college application?
Typos are common, but the mistakes that hurt most are ones a spell checker can't see. The classic is another college's name left in a reused “why us” answer. Look as well for answers cut off when they were trimmed to fit and numbers that differ between your activities and essays. Then check for a story told twice or a leftover note like “fix later.”
How do I preview my Common App before submitting?
Answer every required question first: Common App offers the full preview1 only when your application is ready to submit. The PDF carries a preview watermark; only admission offices can print applications without it. Read it the way a college will. If an answer such as test scores or date of birth is missing, the college may have chosen to hide it5 from its PDF. It still receives the answer.
Why isn't my supplement in the Common App PDF preview?
If it's a Writing Supplement, it never appears there. You review and submit it separately2, and only after you submit the Common App to that college, so the preview can't catch a mistake in those answers. Drop or paste your supplement drafts along with the PDF, and River checks them too, including every college name in your “why us” answers.
Can I change my Common App after I submit?
Not for a college you've already submitted to. Common App says a submitted application can't be changed4, and it can't make changes for you. To fix something, ask that college's admissions office how to proceed. You can still edit your answers for any college you haven't submitted to, which is why it pays to check before your first submission.
How do I check my Common App with River before submitting?
Save your Common App preview PDF, then drop it in the box at the top of this page with your supplement drafts, or paste your answers. River reads everything together and writes a checklist of the problems it finds, worst first, each quoted with where it is and the fix. It opens in your free River workspace, where one tap gives you a clean copy of every answer it changed.
Is it safe to upload my Common App PDF?
Your files stay in your own River workspace unless you choose to share them. River's privacy policy says it doesn't use your documents to train AI models. The AI services that process them for the check are bound by agreements not to either. If you'd rather keep personal details out, paste just your answers instead of the whole PDF.
Is the Common App final check free?
Yes, it is free to start. Your checklist opens in a River workspace, where you can edit it, share it or ask River for more, such as a check of another college's preview. Paid plans add more AI use and access to the most advanced models.
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