Lightning fast merges
Paste two lists and see the results instantly thanks to local processing.
Merge text lists in seconds
Combine Two Lists Into One Instantly
Paste two text lists and MergeLists handles the rest. Choose line-by-line or all combinations, 100% private, and entirely in the browser.
Live demo
Input A
1 lines
Input B
1 lines
1 lines
Merge Controls
Pick a separator; adjust advanced options when needed.
Any sequence works — even tabs or emoji.
Product strengths
Reasons teams choose MergeLists
Every feature is crafted to remove manual work. Right after pasting your lists you have the controls, feedback, and export options needed to deliver polished copy without ever leaving the browser.
Flexible merge modes
Switch between line pairs or all combinations with a single toggle.
Separator control
Use presets or define your own separator to match any workflow.
Ready to share output
Preview counts, trim whitespace, and keep results clean automatically.
Privacy built in
Everything runs on your device so sensitive data stays with you.
One click export
Copy to clipboard or download a tidy text file for your team.
Use cases
Where MergeLists shines
Teams across marketing, product, support, and engineering remove hours of spreadsheet work by letting MergeLists handle the combinations for them. Instead of copying columns into complicated formulas, they paste two lists, click merge, and hand off polished copy to the next workflow.
Whether you are assembling launch messaging, generating keyword permutations, or preparing QA payloads, MergeLists keeps everything in the browser so sensitive data never leaves your machine.
Marketing teams
Create campaign keyword mixes and ad copy variations in moments.
Challenge: Manual spreadsheets slow the handoff between ideation and launch.
Example workflow: Build city + headline combinations for paid campaigns in under a minute.
SEO specialists
Build hundreds of long tail keywords without spreadsheets.
Challenge: Keyword research often stalls when combining modifiers for different intents.
Example workflow: Generate buy + product + location keyword sets you can upload to your tool immediately.
Product owners
Draft onboarding messages and feature combinations for experiments.
Challenge: Experiment roadmaps need quick copy variations to test value props.
Example workflow: Spin up first time user prompts that match platform, persona, and feature state.
Store operators
Assemble product titles, variant names, and option bundles fast.
Challenge: Listings need localized titles, color + size combinations, and promo messaging.
Example workflow: Combine SKU descriptors with sale messaging before importing into Shopify.
Global teams
Pair content with regions and languages for localized launches.
Challenge: Localization teams repeat the same combination exercise for each market.
Example workflow: Merge translation keys with locale specific disclaimers and export directly to your TMS.
Developers
Generate test permutations, data fixtures, and sample payloads.
Challenge: Writing scripts for simple permutations eats into build time.
Example workflow: Produce mocked payloads that cover every feature flag combination before QA.
Workflow
Launch ready copy in three simple steps
MergeLists mirrors the way teams already think: capture the source lists, decide how to combine them, and share the output. No learning curve, no new syntax.
Need to iterate? Adjust options on the fly and the preview updates instantly. Everything stays in one place so collaboration feels natural.
- 1Add your lists
Paste two lists, upload a CSV snippet, or start with sample data. MergeLists keeps formatting intact so you can undo or tweak without re-importing.
- 2Choose your merge style
Pick line pair or all combinations, adjust separators, and toggle clean up options. The preview line count updates live so you know what to expect before generating.
- 3Share the results
Copy, download, or keep editing until the output matches your goal. It is the fastest workflow for shipping copy that is consistent across teams and surfaces.
Why MergeLists
A lightweight tool that respects your workflow
MergeLists was born from a common frustration: too many tabs, too many formulas, and not enough time to simply combine the words you need. We keep the interface straightforward while baking in the controls that power users rely on.
Because there is no signup wall, you can share MergeLists with clients or teammates and trust that it will just work on the first try.
No account required
Open the app and start merging right away with zero onboarding.
Built for scale
Handle thousands of rows with performance tips before you overload your browser.
Human friendly controls
Fine tune separators, trimming, and modes without leaving the editor.
Private by design
Keep client lists and internal data offline with browser only processing.
Pro tips
Get even more from every merge
Power users rely on a few tiny rituals to keep their outputs clean. Adopt these and MergeLists becomes the quiet glue between ideation and execution.
- Use quick examples
- Kick start your session with the example buttons to see how modes behave. They mirror real workflows and act as living documentation for new teammates.
- Trim the noise
- Activate trimming and empty line removal to keep outputs spotless. You will never carry stray spaces into a CMS upload again.
- Export in context
- Copy straight into spreadsheets or download a text file for teammates. The filename and clipboard copy respect your separator so data stays consistent.
Testimonials
Loved by teams shipping fast
MergeLists quietly powers growth, QA, and merchandising teams that need fresh copy every week.
“MergeLists is the fastest way we test new copy ideas before launching campaigns.”
“Our QA team builds test permutations in minutes. No more manual spreadsheets.”
“Perfect for generating product variations across five marketplaces every week.”
FAQ
Answers before you paste
Everything you need to know before adopting MergeLists across your team.
Does any data leave my browser?
No. Everything runs locally in your browser. We do not upload your lists to any server.
What is the difference between merge modes?
Line mode pairs the first item of each list, while all combinations creates every possible pairing.
How large can my lists be?
Thousands of lines are fine. For huge Cartesian outputs we display an estimate so you can confirm.
Can I use custom separators?
Yes. Pick a preset or type your own character sequence such as tabs, pipes, or emoji.
Can I export the results?
Copy the output to your clipboard or download a text file with a single click.
What file formats are supported?
MergeLists works with plain text lists. You can paste from CSV, Excel, or any text editor. Results can be copied back to spreadsheets or downloaded as text files.
Is there a limit on the number of combinations?
For Cartesian mode, we show an estimate and ask for confirmation if the output would exceed 250,000 lines to prevent browser slowdowns. Line mode has no practical limits.
Can I merge more than two lists?
Currently MergeLists handles two lists at a time. For multiple lists, you can merge them in pairs and then merge the results.
What happens to empty lines?
You can choose to remove empty lines with the 'Remove empty lines' option. Otherwise, empty lines are preserved in the output.
Does the tool work offline?
Yes! MergeLists runs entirely in your browser, so it works offline once the page is loaded. No internet connection needed for merging.
Can I undo changes?
You can clear individual input fields or all fields at once. The browser's back button also works to restore previous states.
Is MergeLists free to use?
Yes, MergeLists is completely free with no hidden costs, usage limits, or premium features. Use it as much as you need.
Can I use this for commercial projects?
Absolutely. MergeLists is free for personal and commercial use. No attribution required, though we appreciate it if you share it with your team.
What browsers are supported?
MergeLists works in all modern browsers including Chrome, Firefox, Safari, and Edge. We recommend using the latest version for the best experience.
How do I handle special characters or emojis?
MergeLists preserves all characters including emojis, special symbols, and Unicode text. Just paste your lists as-is and they'll be handled correctly.
Ready to merge your next list?
Open the editor, paste your lists, and create polished combinations in under a minute. No accounts, no waiting, just results.