Amazon Book Description Formatter

The description is the copy under your book’s title on Amazon. KDP lets you format it with a short list of HTML tags, set out on its Write a Book Description help page (checked November 9, 2026):

• Paragraphs and line breaks: <p> and <br>. KDP notes that an empty line between sentences takes two line breaks, and that extra spaces between words are ignored.
• Emphasis: <b>, <i>, <em> and <u>.
• Headings: <h4>, <h5> and <h6> only. The larger <h1> to <h3> aren’t supported, so the formatter changes them to <h4>.
• Lists: <ul> for bullets and <ol> for numbers, each with <li> items. Amazon shows one level, so nested lists are flattened.

Everything else, including <strong>, <span>, <div>, links, images, fonts, colors and inline styles, is converted to an allowed tag or removed with its text kept. The cleanup notes under the editor say exactly what changed, so nothing disappears silently.

KDP caps descriptions at 4,000 characters and counts every one of them, HTML included. A bolded word costs seven extra characters for <b></b>; a five-item bulleted list costs about fifty characters of markup before any words. An ampersand is stored as &, five characters for one symbol.

The counter measures the compact HTML you copy, with no line breaks between tags, so it is the number KDP will see. If you are over, trim the copy before you trim the formatting: most strong descriptions are well under the limit anyway, because shoppers read the first few lines and decide.

• Lead with a hook in a heading. Amazon collapses long descriptions behind “Read more”, so the first line carries the most weight. A short <h4> or a bold sentence stands out without shouting.
• Keep paragraphs short. Two to four sentences each. Long blocks of text are hard to scan on a phone, where many shoppers read.
• Use italics for titles and tone, not whole paragraphs. Long runs of italic or underline are harder to read.
• Use lists for non-fiction benefits. “In this book you’ll learn” followed by three to five bullets is easy to scan. Fiction usually reads better as prose.
• End with who it’s for. A line naming the reader (“For fans of…”) helps the right people recognise the book. Don’t pack in keyword lists, which KDP’s rules prohibit.

If you need the words before the formatting, the book blurb generator turns a premise into a back-cover description and a one-line tagline. Paste the result here to format it.

• Tags show up as text on the page. The HTML went into the normal view of the Description field instead of the Source view. Clear the field, click Source, and paste again.
• Everything is one paragraph. Line breaks from a plain-text editor don’t survive on their own; they need <br> or <p>. The formatter adds them for you from the blank lines and line breaks you type.
• The whole description turned bold. Google Docs wraps copied text in a bold tag set to normal weight. If the style gets dropped and the tag doesn’t, everything turns bold. The formatter recognises the wrapper and removes it.
• Odd characters or an error about invalid characters. Text copied from some apps carries hidden characters, and KDP’s help says empty brackets such as <> cause trouble too. The formatter outputs only the tags on KDP’s list and escapes stray angle brackets as < and >.
• Over the limit after formatting. Because tags count, a description that fits as plain text can go over once formatted. Drop underline and nested emphasis first; they cost characters and add little.

After you publish an update, it can take up to 72 hours for the new description to appear on the product page. If it still looks wrong after that, compare the live page with the preview here; a mismatch usually means the paste went into the wrong view.

1. Type or paste your description. A blank line starts a new paragraph and a single line break becomes <br>, so plain text works without any tags.
2. Select text and click B, I or U (or press Ctrl/⌘ + B, I or U). Put the cursor on a line and click H4, H5 or H6 to make it a heading. Select several lines and click a list button to turn them into bullets or numbers.
3. Check the preview and the counter, and read any warnings about URLs, emails or emoji.
4. Click Copy HTML, open your book’s details in KDP, click Source on the Description field and paste.

The preview is built from the cleaned-up result, not the raw text you paste, so what you see is what KDP receives. Amazon’s own styling differs slightly in font and spacing. The editor runs in your browser and doesn’t use AI.

More free tools for the publishing stage: the KDP cover size calculator for your paperback wrap, the KDP royalty calculator for pricing, and the book page count calculator. To write the book itself, Anthra’s AI book generator takes an idea through chapters, cover and print-ready files.