CompareTwoLists Alternative (2026): Upload CSV, JSON & Instagram HTML Directly — Free, No Row Limits
Quick answer
If CompareTwoLists.com's text-only uploads, size cap or Instagram setup step get in your way, use the free Compare Two Lists tool. Upload CSV, TXT, JSON or Instagram HTML/JSON files exactly as they are — no modes to tick, no row limits, no signup — and get Only in A, In both and Only in B, each with Copy all and CSV download.
CompareTwoLists.com has been the go-to "list diff" page for years: paste two lists, click compare, see what's unique to each. It's simple and it works — until your lists stop being simple.
In 2026, most lists don't arrive as clean text with one item per line. They come as CSV exports, JSON files, or the Instagram data download. This guide shows a free alternative that takes those files as they are.
Why People Look for a CompareTwoLists Alternative
- Text files only. Its page says only text files can be used, one item per line. Anything else needs cleanup first.
- A size cap. The page states a combined limit for the two files (4 MB on one version of the page, 15 MB on another).
- Big lists go download-only. The "Reduce output for large lists" option stops showing results on screen.
- An extra step for Instagram. You need to tick "Instagram followers" before uploading following.html and followers.html, and we didn't find support for Instagram's JSON export in its documentation.
Compare your two lists now
Upload CSV, TXT, JSON or Instagram HTML/JSON as they are. Free — no signup, no row limits.
Try it for free →CompareTwoLists.com vs Compare Two Lists: Side by Side
| Feature | Compare Two Lists (Similarity API) | CompareTwoLists.com |
|---|---|---|
| Price | Free, no signup | Free, no account |
| Upload formats | CSV, TXT, JSON, or paste | Text files only (one item per line) |
| Instagram HTML export | Upload as is — detected automatically | Supported after ticking "Instagram followers" |
| Instagram JSON export | Upload as is — detected automatically | Not found in documentation |
| Mix formats (e.g. JSON vs HTML) | Yes | Not found in documentation |
| Size limit | No row limits | 4–15 MB combined, per its own page |
| Big lists shown on screen | Yes, with previews and counts | "Reduce output" mode: download only |
| Download each result as CSV | Yes, per list | Download available |
| Find-and-replace / regex tool | No | Yes |
CompareTwoLists.com details are taken from its public page as of September 2026. "Not found in documentation" means we couldn't find it, not that it's impossible.
Where CompareTwoLists.com Is Still a Good Fit
Credit where it's due: CompareTwoLists.com has a built-in text replacement tool with regular expressions and capture groups. If you need to reshape messy text by hand before comparing, that's genuinely useful and something we don't offer. If your lists are already short, clean text, either tool will do the job.
How to Compare Two Lists in 3 Steps
- Open the free Compare Two Lists tool.
- Drop your first file (or paste a list) into List A and the second into List B. CSV, TXT, JSON and Instagram HTML/JSON all work, and the two can be different formats.
- Click Compare. Values are cleaned for you (letter case, @ signs, extra spaces) and the results appear in seconds.
List A
Your first list
e.g. last month's customers, or Instagram following
List B
Your second list
e.g. this month's customers, or Instagram followers_1
What You Actually Get Back
Say List A is apple, banana, Cherry, date and List B is cherry, date , elderberry:
| Result | What it means | Example |
|---|---|---|
| Only in A | In your first list, missing from the second | apple, banana |
| In both | In both lists (case and spaces ignored) | cherry, date |
| Only in B | In your second list, missing from the first | elderberry |
Each list has its own count, a preview, a Copy all button and a CSV download.
Instagram Followers: Upload JSON or HTML, No Prep
This is the most common reason people land on list-comparison tools. Download Followers and following from Instagram's Accounts Center, then upload following as List A and followers_1 as List B — in whichever format you picked. There's nothing to tick, no re-export if you chose HTML, and no copy-pasting. "Only in A" is everyone who doesn't follow you back.
Full walkthrough: Who Doesn't Follow You Back on Instagram? Free 2026 Method.
Other Benefits
- Free, no row limits. No blurred results, no subscription.
- No signup. Open the page and upload.
- Mix formats. A CSV against a TXT, or Instagram JSON against HTML.
- All three answers at once. Only in A, In both, Only in B.
- Private by design. Your files are only used to produce your results — never sold, shared, or used to train AI.
Key Takeaways
- CompareTwoLists.com is fine for short, clean text lists and has a handy regex replace tool
- For CSV, JSON or Instagram exports, Compare Two Lists takes the files as they are
- No row limits, results always on screen, copy or download each list as CSV
- Free, with no signup