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Keyword roots

Find demand by starting from the root

A root is the part a whole family of searches has in common, such as generator, remover, or converter. There are three layers here: a classic list of roots, the action roots that grew stronger once AI tools spread, and specific signal keywords that surfaced recently. The data is a monthly snapshot, not a live feed.

Snapshot September 2026Similarweb worldwide, last 28 days · exported 2026-09-11 to 2026-09-16Semrush US monthly volume

classic roots
51
AI-era action roots
19
candidate roots to export
16
recent signal keywords
21

01

Classic roots

These 51 roots come from the list shared publicly by Gefei (哥飞) and are kept as published. The grouping, descriptions, and examples are this site's own; roots with a green dot have keyword data from my own exports this period.

Translator

Convert & process

Translates languages, subtitles, text, or files.

PDF translator · subtitle translator

3,008 keywordsmedian difficulty 62

  1. translator5.60M
  2. google translator1.10M
  3. morse code translator568K

Generator

Generate & create

Generates content, assets, names, code, or structures.

AI image generator · name generator

4,987 keywordsmedian difficulty 59

  1. font generator3.10M
  2. random number generator2.70M
  3. qr code generator2.60M

Downloader

Fetch & transfer

Downloads content and files from a platform or page.

YouTube downloader · reel downloader

11,804 keywordsmedian difficulty 57

  1. instagram downloader7.30M
  2. instagram video downloader6.00M
  3. youtube downloader5.90M

Maker

Generate & create

Makes lightweight content, templates, images, or small outputs.

logo maker · meme maker

7,243 keywordsmedian difficulty 48

  1. free logo maker2.00M
  2. pdf maker789K
  3. gif maker661K

Editor

Convert & process

Edits images, video, PDFs, text, and code.

photo editor · PDF editor

5,566 keywordsmedian difficulty 66

  1. pdf editor3.00M
  2. photo editor free2.10M
  3. ai photo editor723K

Template

Structure & templates

Ready-made structures for documents, designs, resumes, contracts, and pages.

resume template · invoice template

4,392 keywordsmedian difficulty 28

  1. resume template341K
  2. cv template313K
  3. capcut template271K

Checker

Check & analyze

Checks and verifies whether something meets a condition.

grammar checker · backlink checker

9,528 keywordsmedian difficulty 64

  1. ai checker4.40M
  2. website score checker1.20M
  3. seo checker975K

Detector

Check & analyze

Detects AI content, watermarks, objects, or anomalies.

AI detector · watermark detector

5,875 keywordsmedian difficulty 48

  1. ai detector8.80M
  2. detector de ia1.20M
  3. ai image detector461K

Converter

Convert & process

The noun form, suited to “A to B” pages and format matrices.

PDF converter · image converter

7,006 keywordsmedian difficulty 46

  1. mp3 converter3.10M
  2. pdf converter2.20M
  3. currency converter1.80M

Extractor

Fetch & transfer

Extracts information from files, pages, or media.

text extractor · metadata extractor

2,804 keywordsmedian difficulty 32

  1. youtube transcript extractor83.7K
  2. audio extractor81.9K
  3. extractor43.2K

Example

Query modifiers

The searcher wants examples and reference implementations.

resume example · prompt example

No export for this root in this snapshot

Convert

Convert & process

The verb form, common in “convert A to B” searches.

convert image to pdf

No export for this root in this snapshot

Online

Query modifiers

Signals no install: the job is done in the browser.

online converter · online editor

No export for this root in this snapshot

Creator

Generate & create

A near-synonym of Generator and Maker with the same product shape.

video creator · logo creator

No export for this root in this snapshot

Processor

Convert & process

Runs a processing step on files, text, media, or data.

image processor · text processor

No export for this root in this snapshot

Designer

Generate & create

Designs visuals, layouts, brands, or products.

logo designer · room designer

No export for this root in this snapshot

Compiler

Develop & run

Compiles and runs code; language tooling.

online compiler · C compiler

No export for this root in this snapshot

Analyzer

Check & analyze

Analyzes data, SEO, text, or content.

SEO analyzer · data analyzer

No export for this root in this snapshot

Evaluator

Check & analyze

Evaluates quality, performance, scores, or results.

resume evaluator · model evaluator

No export for this root in this snapshot

Sender

Fetch & transfer

Sends files, messages, email, or data.

email sender · file sender

No export for this root in this snapshot

Receiver

Fetch & transfer

Receives data, signals, files, or messages.

file receiver · webhook receiver

No export for this root in this snapshot

Interpreter

Convert & process

Interprets language, or interprets and runs code.

code interpreter · language interpreter

No export for this root in this snapshot

Uploader

Fetch & transfer

Uploads files, images, video, or data.

image uploader · file uploader

No export for this root in this snapshot

Calculator

Calculate & simulate

Calculations for finance, maths, dates, costs, and more.

mortgage calculator · age calculator

No export for this root in this snapshot

Sample

Query modifiers

The searcher wants sample data, specimens, or templates.

invoice sample · JSON sample

No export for this root in this snapshot

Format

Structure & templates

Format references, format conversion, or output conventions.

citation format · file format

No export for this root in this snapshot

Builder

Generate & create

Builds websites, resumes, forms, agents, and so on.

website builder · resume builder

No export for this root in this snapshot

Scheme

Structure & templates

Schemes such as rules, structures, or colour palettes.

color scheme · naming scheme

No export for this root in this snapshot

Pattern

Structure & templates

Patterns in design, programming, and structure.

regex pattern · design pattern

No export for this root in this snapshot

Scraper

Fetch & transfer

Scrapes data in bulk from pages, maps, or platforms.

web scraper · maps scraper

No export for this root in this snapshot

Manager

Manage & track

Manages files, tasks, projects, resources, or downloads.

download manager · task manager

No export for this root in this snapshot

Explorer

View & explore

Browses data, blockchains, files, APIs, or directories.

file explorer · API explorer

No export for this root in this snapshot

Dashboard

View & explore

One place to see metrics, status, and business data.

analytics dashboard · SEO dashboard

No export for this root in this snapshot

Planner

Manage & track

Plans trips, study, meals, projects, or schedules.

trip planner · meal planner

No export for this root in this snapshot

Tracker

Manage & track

Tracks parcels, habits, rankings, prices, or progress.

package tracker · rank tracker

No export for this root in this snapshot

Recorder

Capture & record

Records audio, screens, meetings, and streams.

screen recorder · meeting recorder

No export for this root in this snapshot

Optimizer

Convert & process

Optimizes images, SEO, prompts, performance, and more.

image optimizer · SEO optimizer

No export for this root in this snapshot

Scheduler

Manage & track

Schedules tasks, posts, meetings, and automations.

post scheduler · meeting scheduler

No export for this root in this snapshot

Viewer

View & explore

Views PDFs, HTML, files, metadata, or platform content.

PDF viewer · metadata viewer

No export for this root in this snapshot

Monitor

Manage & track

Continuously monitors sites, prices, status, services, or metrics.

website monitor · uptime monitor

No export for this root in this snapshot

Notifier

Manage & track

Sends alerts when a condition is met.

price notifier · status notifier

No export for this root in this snapshot

Verifier

Check & analyze

Verifies identities, structured data, files, or results.

email verifier · schema verifier

No export for this root in this snapshot

Simulator

Calculate & simulate

Simulates financial, game, physical, or business outcomes.

investment simulator · flight simulator

No export for this root in this snapshot

Assistant

Assist & respond

AI assistants, writing assistants, task assistants.

AI assistant · writing assistant

No export for this root in this snapshot

Constructor

Generate & create

A near-synonym of Builder, leaning towards assembling parts.

form constructor · page constructor

No export for this root in this snapshot

Comparator

Check & analyze

Compares prices, products, models, or options.

price comparator · model comparator

No export for this root in this snapshot

Navigator

View & explore

Navigates information, pages, maps, documents, or systems.

site navigator · map navigator

No export for this root in this snapshot

Syncer

Fetch & transfer

Syncs files, data, accounts, or platforms.

file syncer · data syncer

No export for this root in this snapshot

Connector

Fetch & transfer

Connects systems, APIs, data sources, or devices.

API connector · data connector

No export for this root in this snapshot

Cataloger

View & explore

Organizes content into indexes and catalogues.

media cataloger · file cataloger

No export for this root in this snapshot

Responder

Assist & respond

Auto-replies, customer support, alert handling.

AI responder · email responder

No export for this root in this snapshot

02

Action roots that grew stronger in the AI era

Not part of the 51, and all backed by my own keyword exports. Some became tool demands of their own once AI products spread; others are everyday actions on files and media. Roots that turned out small or noisy are listed as they are, and the description says so.

Remover

New objects such as AI watermarks, filters, and metadata keep creating fresh “remove” demand.

4,408 keywordsmedian difficulty 53

  1. background remover3.70M
  2. bg remover1.50M
  3. vocal remover1.10M

Changer

Changing attributes such as voice, font, colour, or resolution suits small single-purpose tools.

4,951 keywordsmedian difficulty 38

  1. font changer611K
  2. voice changer449K
  3. clownfish voice changer133K

Compressor

Size limits on images, video, and PDFs produce steady tool demand.

5,121 keywordsmedian difficulty 38

  1. pdf compressor2.10M
  2. image compressor1.40M
  3. video compressor811K

Humanizer

A product category that appeared once AI text became common. The head terms are mature, so look in narrower sub-groups.

1,615 keywordsmedian difficulty 77

  1. ai humanizer1.40M
  2. humanizer924K
  3. humanizer ai234K

Transcriber

Once speech recognition matured, transcribing meetings, video, and social content became its own demand.

552 keywordsmedian difficulty 66

  1. video transcriber41.8K
  2. transcriber30.3K
  3. youtube transcriber28.2K

Upscaler

With AI image and video enhancement widespread, raising resolution became a search intent of its own.

2,177 keywordsmedian difficulty 70

  1. image upscaler901K
  2. ai image upscaler120K
  3. upscaler96.1K

Enhancer

Enhancing picture, audio, speech, and content quality has produced many capability-specific tools.

4,115 keywordsmedian difficulty 74

  1. image enhancer546K
  2. photo enhancer376K
  3. image quality enhancer161K

Parser

A root found by working back from real keyword co-occurrence; resume and structured-data parsing intents are clean.

973 keywordsmedian difficulty 33

  1. json parser37.6K
  2. parser19.3K
  3. json parser online9.6K

Resizer

A classic image and media utility with many sub-scenarios, such as by file size or by platform dimensions.

1,829 keywordsmedian difficulty 64

  1. image resizer1.70M
  2. photo resizer749K
  3. image resizer in kb163K

Cutter

Cuts audio, video, and PDFs. Close in intent to Trimmer; audio is the largest scenario.

1,660 keywordsmedian difficulty 24

  1. audio cutter433K
  2. mp3 cutter419K
  3. video cutter163K

Trimmer

Trims the start and end of audio or video. Note that much of this root is physical products such as hair trimmers.

1,972 keywordsmedian difficulty 11

  1. audio trimmer145K
  2. video trimmer111K
  3. mp3 trimmer53.0K

Scanner

Scans codes, documents, or vulnerabilities. QR codes and document scanning are the two largest parts.

1,255 keywordsmedian difficulty 59

  1. qr code scanner1.60M
  2. qr scanner477K
  3. barcode scanner230K

Merger

Merges PDFs, images, audio, and video. PDFs make up most of it.

1,303 keywordsmedian difficulty 38

  1. pdf merger820K
  2. merger pdf41.6K
  3. audio merger34.5K

Splitter

Splits PDFs, audio, video, and vocal stems.

682 keywordsmedian difficulty 50

  1. pdf splitter265K
  2. image splitter123K
  3. stem splitter60.2K

Eraser

Erases backgrounds, objects, and watermarks. It points at the same demand as Remover, so read the two together.

531 keywordsmedian difficulty 42

  1. background eraser235K
  2. eraser bg37.9K
  3. bg eraser33.7K

Validator

Validates structured data, JSON, email addresses, and formats. Leans towards developer tools.

404 keywordsmedian difficulty 57

  1. schema validator220K
  2. schema markup validator64.4K
  3. json validator37.6K

Joiner

A near-synonym of Merger at a tenth of the scale; suits an alias page for the same tool.

168 keywordsmedian difficulty 70

  1. pdf joiner112K
  2. audio joiner54.9K
  3. audio joiner online10.1K

Cleaner

Small. The largest keyword is audio cleaner at just over ten thousand; most people express the same need with remover or enhancer.

180 keywordsmedian difficulty 78

  1. audio cleaner13.3K
  2. audio cleaner ai6.0K
  3. ai audio cleaner5.3K

Denoiser

Removes noise from audio and images. A specialist term with little volume; most people search for noise remover instead.

58 keywordsmedian difficulty 30

  1. bertom denoiser10.0K
  2. bertom denoiser classic3.4K
  3. denoiser3.1K

To export next: roots found by working back from the data

These roots have not been exported on their own, but they keep appearing in the exports of other roots, with real volume attached. The counts and examples below come only from the existing exports. They do not show a root's true size, only that it deserves an export of its own.

Reducer

Reduces the file size of images, PDFs, and photos. Another way of saying Compressor, and not a small one.

Not exported yet · appears 92 times in other roots' exports

  1. image size reducer603K
  2. pdf size reducer578K
  3. photo size reducer260K

Counter

Word and character counting: an old and steady tool demand.

Not exported yet · appears 34 times in other roots' exports

  1. word counter3.20M
  2. character counter987K
  3. random counter generator5.2K

Picker

Colour pickers are the largest part, followed by random pickers.

Not exported yet · appears 15 times in other roots' exports

  1. color picker1.10M
  2. hex color picker from image13.1K
  3. random number generator picker5.7K

Solver

Solves word puzzles and maths problems. Tied to specific games or problem types, so it suits a set of pages.

Not exported yet · appears 9 times in other roots' exports

  1. wordle solver937K
  2. anagram solver839K
  3. math solver scanner3.1K

Finder

Finds fonts, duplicate files, or the source of a video.

Not exported yet · appears 62 times in other roots' exports

  1. font finder474K
  2. video finder15.4K
  3. video duplicate finder14.6K

Tester

Tests keyboards, microphones, audio, and other devices or functions.

Not exported yet · appears 29 times in other roots' exports

  1. keyboard tester506K
  2. audio tester5.1K
  3. qr code tester5.0K

Cropper

Crops images and video frames. Sits next to Resizer and Cutter.

Not exported yet · appears 28 times in other roots' exports

  1. image cropper133K
  2. video cropper91.8K
  3. video cropper online10.5K

Reader

Reads QR codes, files, and formats. Brand terms such as Adobe Reader need to be left out.

Not exported yet · appears 125 times in other roots' exports

  1. qr code reader170K
  2. qr reader82.1K
  3. barcode reader28.0K

Isolator

Isolates vocals. A term that appeared as AI audio matured, next to vocal remover.

Not exported yet · appears 8 times in other roots' exports

  1. voice isolator41.3K
  2. vocal remover and isolator4.6K
  3. audio isolator2.8K

Booster

Boosts volume and audio.

Not exported yet · appears 35 times in other roots' exports

  1. audio booster26.1K
  2. audio booster extension11.6K
  3. video volume booster10.8K

Sharpener

Sharpens images; adjacent to Enhancer and Upscaler.

Not exported yet · appears 14 times in other roots' exports

  1. image sharpener24.8K
  2. ai image sharpener7.1K
  3. image sharpener ai3.0K

Formatter

Formats text for a platform or a format, such as LinkedIn posts or JSON.

Not exported yet · appears 9 times in other roots' exports

  1. linkedin text formatter44.8K
  2. text formatter8.6K
  3. json formatter & validator1.8K

Separator

Separates vocals from backing tracks, or audio from video.

Not exported yet · appears 9 times in other roots' exports

  1. audio separator16.6K
  2. audio separator from video2.9K
  3. editor gui custom inspector separator1.5K

Mixer

Mixes audio online.

Not exported yet · appears 20 times in other roots' exports

  1. audio mixer30.9K
  2. audio mixer online6.4K
  3. voicemeeter virtual audio mixer4.4K

Reverser

Reverses audio and video.

Not exported yet · appears 4 times in other roots' exports

  1. audio reverser14.8K
  2. video reverser13.2K
  3. youtube playlist reverser2.3K

Rewriter

Tied to Humanizer and Paraphraser in the AI writing era. The existing exports hold almost no data on it, so it needs its own export before it can be judged.

Not exported yet · appears 9 times in other roots' exports

  1. perchance text converter/rewriter4.3K
  2. perchance ai text converter/rewriter3.9K
  3. perchance converter/rewriter1.5K

03

Recent signal keywords

Specific keywords that appeared or rose sharply recently, grouped by the demand they belong to. The two tools measure differently, so their numbers are listed separately and should not be added or compared directly.

  1. ai texture generator

    AI TextureNew capability

    A new capability; splits further into text-to-texture and image-to-texture.

    Similarweb · Last 28 days
    87.4K
    vs. usual
    17×
    Semrush · Monthly volume
    390
    Difficulty
    7

  2. 3d model generator from photo

    3DNew capability

    Photo to 3D; splits further into image-to-3D and STL.

    Similarweb · Last 28 days
    66.0K
    vs. usual
    79×
    Semrush · Monthly volume
    260
    Difficulty
    70

  3. low poly 3d model generator

    3DNew capability

    A very small base with a recent surge; watch for another period before acting.

    Similarweb · Last 28 days
    58.8K
    vs. usual
    327×
    Semrush · Monthly volume
    —
    Difficulty
    —

  4. image to stl

    3D / STLInput → output

    A conversion with a specific input and output.

    Similarweb · Last 28 days
    21.6K
    vs. usual
    1.0×
    Semrush · Monthly volume
    3.6K
    Difficulty
    28

  5. png to stl

    3D / STLInput → output

    A conversion with a specific input and output.

    Similarweb · Last 28 days
    —
    vs. usual
    —
    Semrush · Monthly volume
    2.4K
    Difficulty
    22

  6. blender mcp

    MCPAI ecosystem

    “Platform × MCP” combinations are more worth digging into than the head term.

    Similarweb · Last 28 days
    179K
    vs. usual
    3.3×
    Semrush · Monthly volume
    1.9K
    Difficulty
    19

  7. google ads mcp

    MCPAI ecosystem

    A platform-connection long-tail term.

    Similarweb · Last 28 days
    120K
    vs. usual
    2.2×
    Semrush · Monthly volume
    590
    Difficulty
    23

  8. apple notes mcp

    MCPAI ecosystem

    A platform-connection long-tail term.

    Similarweb · Last 28 days
    2.0K
    vs. usual
    2.3×
    Semrush · Monthly volume
    2.9K
    Difficulty
    24

  9. best mcp servers for business sales marketing

    MCPAI ecosystem

    A “role × MCP” combination.

    Similarweb · Last 28 days
    —
    vs. usual
    —
    Semrush · Monthly volume
    2.9K
    Difficulty
    5

  10. codex skills

    SkillsAI ecosystem

    The head term is not surging, but competition is low and the long tail is worth building for.

    Similarweb · Last 28 days
    44.4K
    vs. usual
    0.9×
    Semrush · Monthly volume
    1.9K
    Difficulty
    25

  11. skills creator

    SkillsAI ecosystem

    Turning Skills into a tool.

    Similarweb · Last 28 days
    —
    vs. usual
    —
    Semrush · Monthly volume
    1.0K
    Difficulty
    23

  12. claude watermark detector

    WatermarkEvent-driven

    A search term that formed quickly after an official product event.

    Similarweb · Last 28 days
    63.2K
    vs. usual
    14×
    Semrush · Monthly volume
    0
    Difficulty
    —

  13. chatgpt watermark remover

    WatermarkEvent-driven

    A “model × watermark” combination.

    Similarweb · Last 28 days
    13.8K
    vs. usual
    0.5×
    Semrush · Monthly volume
    3.6K
    Difficulty
    13

  14. sora ai watermark

    WatermarkEvent-driven

    A “model × watermark” combination.

    Similarweb · Last 28 days
    2.6K
    vs. usual
    0.2×
    Semrush · Monthly volume
    3.6K
    Difficulty
    26

  15. ai metadata remover

    MetadataEvent + evergreen

    New demand created by AI, sitting on top of evergreen EXIF and PDF metadata demand.

    Similarweb · Last 28 days
    16.9K
    vs. usual
    5.5×
    Semrush · Monthly volume
    50
    Difficulty
    21

  16. remove exif

    MetadataEvent + evergreen

    The evergreen base.

    Similarweb · Last 28 days
    —
    vs. usual
    —
    Semrush · Monthly volume
    1.0K
    Difficulty
    27

  17. instagram transcript generator

    TranscriptPlatform matrix

    A per-platform long tail that clearly beats the generic term.

    Similarweb · Last 28 days
    43.7K
    vs. usual
    2.3×
    Semrush · Monthly volume
    390
    Difficulty
    8

  18. tiktok transcript generator

    TranscriptPlatform matrix

    Still a workable angle within social-media transcription.

    Similarweb · Last 28 days
    26.1K
    vs. usual
    1.2×
    Semrush · Monthly volume
    2.4K
    Difficulty
    16

  19. youtube transcript search

    TranscriptPlatform matrix

    A second-step action after transcription.

    Similarweb · Last 28 days
    2.3K
    vs. usual
    0.5×
    Semrush · Monthly volume
    1.6K
    Difficulty
    7

  20. codex reset tracker

    Quota / ResetEvent-driven

    Could expand into a cross-platform tracker for quotas, usage, and reset times.

    Similarweb · Last 28 days
    12.4K
    vs. usual
    13×
    Semrush · Monthly volume
    —
    Difficulty
    —

  21. ai visibility checker

    AI VisibilityAI search

    The demand is real, but strong players have already entered.

    Similarweb · Last 28 days
    15.1K
    vs. usual
    1.7×
    Semrush · Monthly volume
    720
    Difficulty
    29

How to read these numbers

  • “Last 28 days” is a worldwide estimate from Similarweb. “Monthly volume” and “difficulty” come from Semrush and cover the US only. They are not the same measure.
  • “vs. usual” is the last-28-day volume divided by the keyword's average volume. 3× means it is running at three times its usual level.
  • Surging keywords move fast. ai texture generator was 17.6K when exported on 11 September and 87.4K four days later. The figure from the latest export is used throughout.
  • Keyword counts include only keywords that use the root as a separate word, with adult and gambling terms removed.

How it is updated

  • Exports are repeated monthly to produce a new snapshot. Old ones are kept, so a root can be followed month by month.
  • The classic list is reference material and is not edited when a month's data changes.
  • When a new model, limit, or platform feature appears, signal keywords are added without waiting for month end.