You do not need any formal qualifications to become a web designer. In reality, however, most designers have experience in other design fields, or have taken training in web design, either through college or by teaching themselves.
You will need a good working knowledge of HTML, and at least two of the following design packages: Dreamweaver; Photoshop; Flash and Fireworks; GoLive; FrontPage (for PCs). You can find courses covering these programs at local colleges, and you can find many online tutorials, which are often free to use.
You could take one of the following qualifications, which provide a good grounding in web design, interactivity and internet technology: BTEC Interactive use of Media levels 1 to 3; OCR Certificate for IT Users – Level 2 (CLAiT Plus) and Level 3 (CLAiT Advanced); OCR iMedia Users levels 1 to 3; City & Guilds E-Quals IT Users awards (7266) – Level 2 (Diploma) and Level 3 (Advanced Diploma).
You could also take a higher level course, for example foundation degree, BTEC HNC/HND or a degree in a design or multimedia subject. Relevant subjects include: web design and development; multimedia design; digital media development; interactive computing.
Employers will want to see evidence of your ability, so you will need a portfolio of work to demonstrate your creative and technical skills, usually in the form of a CD, DVD or 'live' websites. This could include college, paid or voluntary work.