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SendForm Blog Overview

Browse all articles and tutorials in one overview.

A stylized browser window displaying an HTML file upload input field surrounded by floating document icons and interface elements.
Jul 23, 2026 · 6 min

HTML File Upload Input: Attributes, Limits and Browser Behaviour

The HTML file upload input is a single line of code, <input type="file">, that lets visitors pick files from their dev… Read more

Two sleek UI input fields side by side, one grayed out and one editable, illustrating readonly vs disabled form inputs.
Jul 17, 2026 · 5 min

Readonly vs Disabled Inputs: They Are Not the Same Thing

The quick answer: a readonly input stops users from editing a field's value but still submits that value with the form… Read more

Two clean UI form elements side by side, illustrating the HTML datalist vs select choice in a bright modern workspace.
Jul 09, 2026 · 5 min

HTML Datalist vs Select: Which One Fits Your Form

The quick answer: use a <select> when the user must pick from a fixed, known list of options, and use an HTML <datalis… Read more

A glowing web form with a ghost-like honeypot field trapping red bots in dark navy space, shielded by a luminous padlock icon.
Jun 25, 2026 · 5 min

Honeypot Fields: The Invisible Spam Trap Every Form Needs

A honeypot field is a hidden form input that real people never see or fill in, but automated bots do. If your server g… Read more

Modern illustration of a form input field with a glowing validation checkmark pattern overlaid on a clean digital interface background.
Jun 16, 2026 · 7 min

Using Pattern Attribute for Form Input Validation

The input pattern attribute lets you attach a regular expression directly to an HTML form field, so the browser valida… Read more

Modern illustration showing a stylized HTML form with data flowing through different encoding pathways, representing form enctype concepts and data transmission methods.
Jun 08, 2026 · 7 min

Understanding HTML Form Enctype: When and Why It Matters

The html form enctype attribute tells the browser how to encode form data before sending it to the server. Most of the… Read more

HTML textarea element displayed in a web form with a label, placeholder text, and character counter
Jun 01, 2026 · 9 min

Improve Your Forms with HTML Textarea: Best Practices and Examples

The HTML textarea element is a multi-line text input that lets users type longer content into your forms, like message… Read more

Web form with a radio button group showing single-choice selection options
May 27, 2026 · 9 min

Radio Buttons in Forms: Accessibility and User Experience

Radio buttons in forms are a specific input type designed to let users pick exactly one option from a predefined set. … Read more

Illustration of organized form elements and grouped input fields with glowing connections, representing accessible fieldset and legend structure in web design.
May 19, 2026 · 7 min

Fieldset and Legend: Building Accessible Form Groups

The fieldset and legend elements in HTML are the proper way to group related form controls together and label that gro… Read more

Web form protected by multiple security layers including CSRF tokens, validation, encryption, and spam filtering
May 14, 2026 · 9 min

Securing Form Submissions: CSRF, Validation, and Data Protection

Form security is the set of techniques that protect web forms from being abused, hijacked, or exploited to steal data … Read more

HTML code editor showing a form with a mailto action attribute crossed out and replaced with a proper HTTPS form backend endpoint, illustrating the correct approach to HTML contact forms
May 04, 2026 · 6 min

Why mailto in a Form Action Is a Bad Idea

Using mailto in an HTML form's action attribute is one of those ideas that sounds reasonable until you see what actual… Read more

HTML form action attribute pointing to a form endpoint URL — code example showing method POST
Apr 27, 2026 · 8 min

What the HTML Form Action Attribute Actually Does (and Why It Matters)

The HTML form action attribute tells the browser where to send your form data when a user hits submit. It's the URL th… Read more