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
required field
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "required field" is correct and usable in written English.
It is typically used in forms or applications to indicate that a certain piece of information must be provided by the user. Example: "Please fill out all the required fields before submitting the form."
✓ Grammatically correct
Wiki
Science
News & Media
Alternative expressions(4)
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
17 human-written examples
Since their commissioning, both barreltype compressors have consistently required field balancing due to fouling, and even immediately after overhaul and shop balancing.
* indicates required field We are very protective of your privacy and provide a one-click unsubscribe option.
Formal & Business
For uncalibrated dates that fall outside the range of even the Fairbanks program, and where no literature-sourced date is available, an age of 50 Ka (the limit of the Fairbanks et al. program) is entered into the Year BP field (with the standard 12% error) but is labelled as 'assumed;' as Year BP is a required field, we need to enter an approximate date for the eruption.
You'll also need to think about your current salary, as this is also normally a required field for applications.
News & Media
If you somehow make it to the end of the reservation process without quitting in frustration, you may well find you have missed a required field.
News & Media
But the Levine's dispassionate survey is so effective that, at least until this year's budget cuts, a visit here was a required field trip for the county's eighth graders.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
43 human-written examples
8) Place a red asterisk before required fields.
News & Media
EHRs designed without physicians in mind can turn them into transcriptionists and reduce patients to a collection of clinical measures and required fields.
News & Media
For instance, users must abide by rules set for each of the fields, as there are required fields and controlled vocabulary that must be strictly followed.
Automated means were intended to improve completeness of case records fields by duplicating required fields, but this has not always been the case (13 ).
Science
"Event Title," "Event Type," "Host" and "Where" are required fields.
Wiki
Expert writing Tips
Best practice
When designing forms, clearly mark "required fields" with a visual cue like an asterisk or a different background color to ensure users don't miss them.
Common error
Don't assume users will always fill "required fields". Implement client-side and server-side validation to catch empty submissions and provide helpful error messages.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "required field" functions as a noun phrase where the adjective "required" modifies the noun "field". It denotes a specific data entry point in a form or application that must be completed. As Ludwig AI confirms, the phrase is correct and usable.
Frequent in
Wiki
28%
Science
28%
News & Media
19%
Less common in
Formal & Business
14%
Encyclopedias
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "required field" is a common and grammatically correct term used to denote mandatory data entry points in forms and applications. Ludwig AI analysis confirms its validity and widespread usage across various contexts, including Wiki, Science, and News & Media. For form design, clearly mark such fields, but also validate to guarantee they are not left blank. Alternatives like "mandatory field" or "essential field" can be used for variety. Always ensure clear communication to the user about which fields they need to complete.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
mandatory field
Replaces "required" with "mandatory", indicating a non-negotiable entry.
obligatory field
Uses "obligatory" instead of "required", suggesting a duty to provide the information.
necessary field
Substitutes "required" with "necessary", highlighting the essential nature of the field.
essential field
Emphasizes the critical importance of the field by using "essential".
compulsory field
Employs "compulsory" to convey that filling out the field is not optional.
field required
Inverts the word order while maintaining the core meaning.
field must be completed
Shifts from an adjective-noun structure to a verb-based instruction.
field needs to be filled
Indicates the need for completion in a more descriptive way.
information needed
Focuses on the information itself rather than the field.
data required
Similar to "information needed", but uses "data" instead.
FAQs
How to indicate that a field is "required field"?
Use visual cues like a red asterisk (*) or a specific label such as "(required)" next to the "mandatory field".
What is another way to say "required field"?
Alternatives include "mandatory field", "obligatory field", or "essential field", all conveying the necessity of completing the field.
What is the difference between "required field" and "optional field"?
A "required field" must be completed before a form can be submitted, while an "optional field" can be left blank. In forms, a "mandatory field" ensures you collect essential data, whereas an optional one gathers supplementary information.
What happens if I don't fill out a "required field"?
Most forms will display an error message, preventing submission until all "necessary fields" are completed. This ensures you provide all the essential information.
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
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested