The best free YouTube keyword tools in 2026 (and what each one is actually good for)

On YouTube, a "keyword tool" is really answering three different questions: what are people searching for, is interest growing, and can a video on this topic get views. No single free tool answers all three. Here are six free ones, what each is good for, and how to combine them in 10 minutes.

The quick answer

1. YouTube search suggestions

Type the start of your topic in YouTube's search bar and read the suggestions. Then try topic a, topic b… and how to topic, topic for beginners, topic vs. Every suggestion is something real people searched for.

Good for: finding the exact phrasing viewers use. Limits: no numbers at all, and suggestions are personalized a little to you (use a private window).

2. YouTube Studio's Research tab

In YouTube Studio → Analytics → Research, you can search a topic and see what your viewers and viewers across YouTube search for, with relative interest and "content gaps" (searches where viewers don't find good videos).

Good for: the closest thing to official YouTube search data, and content gaps. Limits: relative interest, not volumes; you need a channel, and small channels see less data.

3. Google Trends with "YouTube Search"

On Google Trends, switch the search type from "Web Search" to "YouTube Search". You get interest over time and by country, and rising related queries.

Good for: checking if a topic is growing, seasonal or dying before you spend a week on a video. Limits: relative values (0–100), and niche topics often have too little data.

4. Returbe's free keyword tool

Our free YouTube keyword tool answers the third question: if I make a video on this, how do videos like it perform? It reads every video Returbe tracked over the last 12 months with the keyword in the title and shows:

• number of videos and channels, uploads in the last 30 days,
• median views and the biggest video,
• median subscribers of the competing channels,
• share of outliers (videos at 3×+ their channel's usual views),
• 12-month activity, top channels, related keywords,
• an opportunity score: 60% demand (views, uploads), 40% the opposite of competition.

Two real examples from this week:

"ai tools" sounds like a great topic, but videos with it in the title get a median of 2,500 views from channels averaging 80K subscribers: crowded and low-reward. "minecraft" is huge, competitive, and still rewards new videos.

Limits: it only knows videos Returbe tracks (10,000+ channels, mostly in the top markets), so very niche keywords can come back with few videos.

5. vidIQ's free plan

vidIQ is the best-known YouTube SEO suite, with keyword research and scores inside YouTube. Its free plan includes 150 AI credits a month; the complete keyword data is in the paid plans. We compare it in detail in vidIQ vs Returbe and vidIQ alternatives.

Good for: keyword scores while you browse YouTube. Limits: the volume numbers are estimates (like every tool's), and most of the depth is paid.

6. OutlierKit's free trial

OutlierKit combines keyword research aimed at low-competition, high-RPM topics with outlier research, on credits. The trial gives 30 credits, no card, and a keyword search costs 2 credits. More in OutlierKit vs Returbe.

Good for: a one-off research session. Limits: credits run out fast.

A 10-minute workflow with free tools

1. List phrasings with YouTube's search suggestions (2 min).
2. Check the trend of the 3 best phrasings on Google Trends → YouTube Search (2 min). Drop anything falling.
3. Check performance of the survivors in the keyword tool (3 min): prefer keywords where median views are high and the median competing channel is not much bigger than yours.
4. Look at the outliers on that topic: the videos that got 3× to 10× their channel's usual views. Their titles and thumbnails show you the angle that works (how to find them).
5. Write your title with the viewer's phrasing and the angle of the outliers (3 min).

Don't over-optimize keywords

Most YouTube views come from the home page and suggested videos, not search. There, viewers never typed anything: the topic, title and thumbnail decide. Keywords matter most for search-led videos (tutorials, reviews, "best X", "how to"). For everything else, use keyword tools to understand what people want, then spend your time on the title and the idea.

Key takeaways

• Search suggestions = what people type. Google Trends = is it growing. Returbe = can a video on it get views.
• No free tool has real YouTube search volumes: YouTube doesn't publish them.
• Check competition, not just demand: a popular keyword dominated by big channels is a bad bet for a small one.
• Keywords matter most for search-driven videos; for browse and suggested, the idea, title and thumbnail matter more.

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