Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
keep for reference
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "keep for reference" is a perfectly acceptable phrase in written English.
It is used to state that something should be kept or remembered for future reference. For example, you might write, "Keep this information for reference for future use."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
4 human-written examples
She fills in my blanks by writing in a Sharpie over the typing on a piece of printer paper, which she gives to me to keep for reference.
News & Media
Detailed procedure manuals and resources, including equipment manuals and usage guidelines for nurses, were provided for staff to keep for reference throughout the data collection phases.
Science
Patients and their partners were asked to sign three copies of a consent form - one to be kept in the patients' medical records, one for the patient or partner to keep for reference and one for the researcher.
Science
Make sure you jot down major events in your story to keep for reference if you don't have the time to look back through your book every now and then.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
"This can all be stored and kept for reference," said Lucas Noldus, who designed the system.
News & Media
To be fair, that number includes all the final renders, assets, cached data, computer models, digital paintings, etc. — but it's all data Pixar keeps for reference in the future.
News & Media
As for the coverage in Fig. 2, it does not follow the same tessellation since clustered stations (red edges) will transmit common signals for multi-point operation, however the same tessellation is kept for reference.
Samples from all deliveries are kept for reference.
Factsheets were found useful and kept for reference.
Science
Sometimes you discover a gobbet of opinion to cut out and keep for future reference.
News & Media
These purchases are the kinds of books I know I want to own and keep, for future reference or to be able to pull off the shelf at any time.
News & Media
Expert writing Tips
Best practice
When instructing someone to "keep for reference", be specific about what the item is and why it might be needed later. For example, "Keep this receipt for reference in case you need to return the item."
Common error
Avoid using "keep for reference" when the context already implies that something should be kept. Instead of saying "Keep this email for reference later", consider simply saying "Keep this email" if the need for future reference is obvious.
Source & Trust
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "keep for reference" primarily functions as a directive, specifically an imperative phrase. It instructs the recipient to retain something for future use. As Ludwig AI confirms, this phrase is perfectly acceptable in written English. Examples show its usage in contexts ranging from immigration advice to technical manuals.
Frequent in
News & Media
30%
Science
30%
Wiki
20%
Less common in
Academia
10%
Formal & Business
5%
Reference
5%
Ludwig's WRAP-UP
The phrase "keep for reference" is a directive phrase advising someone to retain something for future use. Ludwig AI confirms its grammatical correctness and acceptability. While primarily neutral in register, it finds common usage in news, scientific, and instructional contexts. The intent is to ensure preparedness and efficiency by retaining information that may be needed later. Alternatives include phrases like "retain for future use" or "save for future consultation". When using "keep for reference", ensure the context justifies the instruction and that the item's purpose for future reference is clear. Overusing the phrase in obvious situations can lead to redundancy.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
retain for future use
Focuses on the action of retaining something specifically for later application.
save for future consultation
Emphasizes the act of saving something with the intention of consulting it at a later time.
hold for later review
Highlights the act of holding onto something for the purpose of reviewing it in the future.
preserve for future access
Stresses the preservation aspect, ensuring accessibility at a later point.
maintain for future inspection
Suggests maintaining something in a state where it can be inspected later.
file away for future needs
Implies storing something in an organized manner to meet future requirements.
store for subsequent examination
Focuses on storing something for the purpose of examining it at a later time.
archive for later study
Highlights archiving something with the intent of studying it in the future.
catalog for future reference
Emphasizes the process of cataloging for facilitating future reference.
log for future look-up
Implies logging information for ease of future look-up or retrieval.
FAQs
How can I use "keep for reference" in a sentence?
You can use "keep for reference" to advise someone to retain information for future use, like "Please keep this document for reference during the project" or "Keep this guide for reference when troubleshooting issues".
What's a synonym for "keep for reference"?
Alternatives to "keep for reference" include "retain for future use", "save for future consultation", or "hold for later review".
Is it correct to say "saved for reference"?
Yes, "saved for reference" is a correct and commonly used phrase. It means the same as "keep for reference", indicating something is stored for future use or consultation.
When should I use "keep for reference" versus "save for reference"?
Both "keep for reference" and "save for reference" are interchangeable in most contexts. "Keep" might imply maintaining physical possession, while "save" often refers to storing digital information, but the distinction is subtle.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.3/5
Expert rating
Real-world application tested