Last reviewed August 2023
Please give these debugging tips a try before making a new post. If none of the suggestions work, please include the information that we request at the end of this guide in the new post that you create. Thank you!
Forms are one of the most useful parts of modern websites because they allow us to capture input from our visitors.
There are many ways to use forms: contact forms, such as contact forms and sign-up forms. Seeing as there are many types of forms, implementing one can take time. Here are some tried and true approaches to debugging common form errors and things to consider.
- You need to have a
data-netlify=trueattribute in your HTML
<form …>definition. Note that once the form is processed during deploy, the resulting HTML that we serve will NOT have that parameter in it anymore!
- You need to include a
nameattribute on the opening
<form>tag. When the page is deployed we will add a hidden input with a
form-nameattribute that’s the same as the name you set for the form. This is used in our API to determine which form is receiving the input. This is handled automatically as long as the HTML form includes a
nameshould be unique across a site.
- Do not include extended symbols like
<form ...>html definition. These will prevent our form detection from finding your form!
- Apostrophes (
') are a hard no in the attribute values of input tags. For example,
value="Don't do this"would result in build errors. Instead use
value="Do not do this".
- Every input in the form must have a unique “name” attribute. Something like
<input name="email" ...>or
<textarea name="message" ...>is what you need. The name is sent along with the value in the submission and our API will only record data from form submissions with names matching the definition as parsed at deploy time.
If you have an HTML5 compliant form that follows those guidelines, it just works!
- If you want to show your own content after the
POSTrather than our generic thank-you page, make sure you include an
action=/pathparameter in your form definition. (
/pathshould be the page you want to display - might be “/” or “/thank-you/english.html” - must be either ‘thank-you’ to use our automatic thank you page, or a path starting with / - but NOT a complete URL starting with http(s) ). While you wouldn’t seem to need an action for AJAX forms - it’s how we know what to show after submission, so you do need one unless you’d like us to show our thank-you page. If this path doesn’t exist, we will use our own standard thank-you page.
HTML forms: Once the HTML form is deployed with the
netlify attribute, you’ll see an entry (with its name from step 3) in our UI at
https://app.netlify.com/sites/YOURSITENAME/forms . This will be present in our UI immediately after deploying. If it isn’t, we haven’t processed the form for some reason such as it not being present in HTML format. The form along with its detected fields will also be logged in the build log.
Netlify Recaptcha: If you’re using the
<div netlify-recaptcha></div> element to add our recaptcha, you can only have one on any single page. If you put this div in multiple places, only the first one parsed will be replaced with an actual recaptcha.
When you’re absolutely sure that the submissions are being sent correctly by the browser, but you’re not seeing them in the UI, there are 2 common scenarios that might cause this:
fetch('/'...and you’ve a redirect rule like
/* /foo 301!, submissions would probably not work. This is because the submissions are being “consumed” by the redirect rule. Instead, you cans set the endpoint to any other page that doesn’t redirect. Note:
200rewrites could cause problems too.
- You’re using some kind of server side rendering to render the endpoint. For example, if you’re rendering the page that you’ve set as the endpoint using a serverless function, you’d not seem the submission in the UI. The solution is similar, set the endpoint to a page or an asset (like
/favicon.ico) that already exists.
- We use Akismet on all form submissions. If you see the form in the app.netlify.com UI, but you don’t see any of your test submissions, double check that you aren’t sending junk info in your test submissions or submitting over and over again from the same IP address (which looks spammy and may be hidden in our UI until you choose to view the spam submissions).
Customers have reported that certain field names, such as
from, can cause all submissions to be marked as spam. Double-check your form field names and consider renaming your fields – particularly if one is
Still having trouble? Please start a new topic tagged
In that topic, Please:
- Write a fantastic title that summarizes your issue and is helpful for other users
- The URL for your live form as you want visitors to use it
- The form name that you’ve set and that shows in our UI
- Any errors or logs from the Netlify build logs, dashboard or browser developer console
- Description of anything you have tried that did or didn’t help or make things better/worse