I would really like to limit the title length on products in Magento.

What I've tried is adding 'maxlength' => 65 somewhere in \app\code\core\Mage\Adminhtml\Block\, without success.

Does someone know how to add this feature? In HTML it will just be adding length="65" maxlength="65".

  • Slightly off-topic: Better off truncating the title to 12 words, rather than 65 Chars... Jun 28, 2012 at 1:29
  • Use the developer block hinting to ensure THAT block is actually making the output you see on front end... or the block that dictates the title's input.
    – Krista K
    Jun 28, 2012 at 7:25
  • @MikeHudson True, but HTML doesn't support maxlenght="so many words".
    – cobra91
    Jun 28, 2012 at 14:20
  • @ChrisK In the front-end I'd like to show the same as in the back-end. Truncating isn't an option for me.
    – cobra91
    Jun 28, 2012 at 14:21

4 Answers 4


After almost 10 hours of searching I gave the up the "best" way, and choose for the roundabout.

Simply add

document.getElementById("name").setAttribute("maxlength", "65");
document.getElementById("name").setAttribute("length", "65");

to app/design/adminhtml/default/default/template/catalog/wysiwyg/js.phtml

  • Original question should be more like "where do forms come from". The code around the form for new products is in app/design/adminhtml/default/default/template/catalog/product/edit.phtml on line 52: <?php echo $this->getBlockHtml('formkey')?>. Trying to find what actually makes this form's HTML is quite a mystery to me.
    – Krista K
    Jun 28, 2012 at 16:59
  • Stumped, I asked this question on Stack Overflow: stackoverflow.com/questions/11249858/…
    – Krista K
    Jun 28, 2012 at 17:27

Copy the app/code/core/Mage/Adminhtml/Block/Catalog/Product/Edit/Tab/Attributes.php



In the function _prepareForm(),

after the line if ($form->getElement('meta_description')) { ...


if ($form->getElement('name')) {
    $form->getElement('name')->setOnkeyup('checkMaxLength(this, 1500);');

This should work


As a result from that SO question. One repeating pattern in form creation is $fieldset->addField, so that presented itself as a key way to grep in files.

user@magento:~/www/app$ grep -rin "addField.*text" * | grep -i product
code/core/Mage/Adminhtml/Block/Catalog/Product/Edit/Tab/Super/Config/Simple.php:140:        $fieldset->addField('simple_product_inventory_qty', 'text', array(

There were about a dozen results which were quickly narrowed down (we're not caring about giftcard or Attribute sets). I'm not 100% sure THIS file is the answer but it seems that some logic could be added to catch whether or not the input's name=="Name" and then a maxlength could then be added in.


JS or POST trunc is the best bet, but an alternate failproof method is at the DB. You can limit it in DB by changing the cell structure to varchar(65) which would only allow 65 characters to be stored there. In phpMyAdmin you find the table, click it, then look for the "structure" tab. Find the col you wanna limit, pick varchar from dropdown, then set it to 65. This will also trunc all existing titles to 65.

EDIT: This script may be helpful too if you just wanna count the chars instead and leave it to your editors to keep it around 65. This would work on any field, just change the input[name=""] to whatever field you need counted:

<script type="text/javascript">
    var count_name = $('input[name="MY-TITLE-INPUT-NAME"]');
    var count_name_val = $(count_name).val().length;
    var stage_65 = '<br/><div style="font-style:italic;">&nbsp;&nbsp;Using <span class="stage_65">' + count_name_val + '</span> of 65 Google Chars</div>';

    $(count_name).after(stage_65).on('keyup', function(){

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