YouTube's limits look generous — 100 characters for a title, 5,000 for a description — until you learn how much of each anyone actually sees. Search results display about 70 characters of a title; the description shows roughly the first line or two before a Show more link swallows the rest. YouTube is a fold-first platform like every other feed, and the channels that grow treat the display width, not the field limit, as the real constraint.
The short answer: 100, 5,000, and 500
Titles cap at 100 characters, but search and suggested feeds display only about the first 70. Descriptions cap at 5,000 characters, with roughly the first 100–157 characters visible above the fold depending on device — phones show less, desktop a little more. Tags, still worth setting even though they're a minor signal, share a 500-character budget across the entire list. Those three budgets, and where each one folds, decide most of what a viewer ever reads about your video.
YouTube limits at a glance
The numbers by field, as of 2026. The hard limits have been stable for years; the display columns are what your thumbnails-and-text strategy should actually be built around.
| Field | Hard limit | What actually displays |
|---|---|---|
| Video title | 100 characters | ~70 in search and suggested |
| Description | 5,000 characters | ~100–157 above Show more, by device |
| Tags | 500 characters total | Not shown to viewers |
| Channel description | 1,000 characters | First ~100–150 in channel search |
| Chapters (timestamps) | Minimum 3, first at 0:00 | Chapter titles shown and indexed |
Titles: win the first 70 characters
A 100-character title is legal; a truncated one is a liability. When a title runs long, YouTube clips it with an ellipsis exactly where you didn't plan — often mid-claim, sometimes mid-word. The discipline: treat 70 characters as the real limit and treat the leftover 30 as slack, not as content. Put the searchable keyword and the emotional payoff in the front half, and cut the filler — "OFFICIAL", "!!!", channel names — that spends characters viewers never see.
Specificity earns clicks at constant impressions: "7 Mixing Mistakes Killing Your Tracks" tends to beat "Mixing Mistakes to Avoid" because the number sets a promise, and the keyword helps both the human and the search ranking. And since the title is the strongest on-page text signal YouTube reads, the search phrase belongs up front for the algorithm as much as for the eye.
Pair the title with the thumbnail rather than repeating it: the thumbnail carries the visual hook — a face, a chart, a before-and- after — while the title carries the searchable claim. When both say the same thing, you've spent two surfaces on one idea; when they split the job, the impression tells a fuller story in the half second a viewer gives it.
Descriptions: the fold, the links, the chapters
The first 100–157 characters of a description appear above Show more; that opening is effectively your meta description — one line that sells the click and states what the video covers, keyword included. Below the fold, a standard structure works: the summary paragraph, links worth clicking (subscribe, sources, socials, sponsor), then timestamps.
Chapters — a 0:00 timestamp followed by at least three more in ascending order, each section at least ten seconds long — do double duty. Viewers jump straight to what they came for, and YouTube indexes chapter titles as searchable text, which can surface your video for queries matching a chapter name rather than the main title. Chapter titles are free keyword real estate that most channels leave generic ("Part 2" instead of "Wiring the input jack").
Keep the clickable stuff below the first screen. Links crammed into the visible opening compete with the hook for attention and read as spam to the exact viewers you're trying to convince. One clear promise line, then the links — viewers who tap Show more are signaling they want precisely what's down there.
Why the fold decides your click-through rate
YouTube's ranking loop runs on behavior: impressions, then clicks, then watch time. The title and the one visible description line are the entire pitch behind every impression, which makes CTR the metric where fold discipline pays. A title that truncates before its payoff and a description that opens with legal boilerplate both tax the same number.
Remember the screen: most impressions happen on phones, where suggested-feed cards show even less description text than desktop search does. If your payoff only survives on a wide monitor, it isn't in the pitch yet.
Wire it all together before publishing: keyword front-loaded in the title's first 70, a one-line hook in the description's first 150, and chapters named for real subtopics. To keep the budgets honest while drafting, paste your title and description into the WordlyCount counter and watch the counts against 70 and 150. It's the same fold math that governs meta description length on the open web and Google Ads character limits at 30 characters a headline — the window is always smaller than the field.