# No "YouTube" in the English name; the Polish name is "Konwerter Youtube MP3": a convert-to-MP3 extension grew to 8,000 users in three months · Chrome extension

> Source: https://stringers.io/en/ext/chrome_akmpjekooepipiljllifkpmkmobkbhhk.html (Stringers / 什么值得做, generated 2026-11-08)
> Stringers answers one question every day: what small product can one or two people build in a few months and actually make money from. Numbers come from 15 databases we collect daily, each with source and date.
> For agents: these verdicts and the underlying databases (verified revenue, App Store / Google Play charts, ad libraries, GitHub, Product Hunt…) are queryable live over MCP — tools today / hot / products / directions / direction / data. Setup: https://github.com/komako-workshop/stringers (the user logs in at stringers.io → "配置 agent" to get a personal URL). Site index: https://stringers.io/llms.txt

> "YouTube to MP3" is one of the oldest big keywords on the internet. Because of policy, almost no one holds it on the Chrome Web Store. This one puts the term in its localized titles, capturing non-English search traffic, using a template already proven on a 60k-user main account.

[Chrome extension](https://stringers.io/en/ext/index.md) · written 11-6

Video to MP3 Converter · gaxunawenu81

# No "YouTube" in the English name; the Polish name is "Konwerter Youtube MP3": a convert-to-MP3 extension grew to 8,000 users in three months

**What it is:** A Chrome extension. Click it on a video page and cloud servers convert the audio to MP3 and other formats, with cover art, playlists and trimming. A few free uses, then a subscription.

**Why it took off:** "YouTube to MP3" is one of the oldest big search terms on the internet, and the Chrome Web Store's policies left it almost unclaimed. It put the term in local-language titles and picked up non-English search traffic, using a template already proven on a 60k-user parent extension.

**B** **How you could follow it:** Use the same play: neutral English name, real search terms in local languages. Pick a language it has done poorly in, or another big term blocked by policy. Be more generous with the free tier, back up with multiple accounts, and get users through local-language store optimization and review articles.

B grade: big demand, a real monetization path, few people know about it, low barrier to copy. But it's arbitrage on the edge of store policy and could be removed any time. Several copycats appeared 9–October, and the parent and this product have both stopped growing. Whispers in small circles

8,000 users · rating 4.115384615384615 (52)

In Nov 6, I opened "Video to MP3 Converter" in the Chrome Store. The English page never says YouTube; the description only mentions converting audio from "supported pages". Switch the language to Polish and the title becomes "Konwerter Youtube MP3". In Spanish it's "Convertidor Youtube MP3", in Russian "Конвертер Youtube MP3", and in Turkish "Youtube MP3 Dönüştürücü". It launched in Aug 5 and reached 1 users by Nov 8,000. Growth came from an old big keyword plus a policy gap, and a template that already worked and was copied over. You can follow it, but you'd be earning from a policy gap, and the window could close at any time.

### What it is

A Chrome extension: click it on a video page to save the audio as MP3, M4A, OPUS or WAV, up to 320kbps, with cover art, whole-playlist downloads and trimming. Conversion runs on cloud servers, not your computer.

Free only for a few uses. In Aug 27, a user named Techniker Jan left the comment "you have to pay for it", which 4 people marked helpful. In Sep 28 someone asked "why these tools are paid ?". The store listing doesn't tick "In-app purchases", but the description is clear: "a number of free downloads… optional Premium upgrade unlocks unlimited use".

The developer is a random gmail account, gaxunawenu81, with no website and no trader status. The privacy policy is hosted on Google Docs.

### Why this one, and why now

**Demand is one of the oldest on the internet.** People want to save songs, podcasts and online lectures from YouTube as audio files. Sites like y2mate and ytmp3 have done this for over a decade, full of ads and requiring copy-paste of links. An early five-star review said it plainly: "Works great for converting YouTube videos to MP3 quickly" (Aug 19).

**But in the Chrome Store, almost nobody holds this term.** Store policy forbids extensions that download YouTube content, so MP3 downloaders with YouTube in the name barely survive. As of Nov 7, the largest store extension with both YouTube/YT and MP3 in the name had only about 1,000 users. A few established MP3 extensions in the store have 300k and 60k users, but they only convert local files or grab media from the page, and none works on YouTube.

**Its approach: a neutral name in English to pass review, real search terms on the local-language pages.** The interface supports 55 languages, and each one has a title and description reading "Youtube MP3 Converter". Someone in Brazil, Indonesia or Germany searching "youtube mp3" in their own language in the store or on Google can find it.

The growth curve is smooth (90-day curve from extops.dev and daily store numbers):

| Date | users | Rating |
|---|---|---|
| 8-31 | 768 | 9 reviews |
| 9-20 | 2,000 |  |
| 10-04 | 4,000 |  |
| 10-08 | 5,000 | 28 ratings, 4.50 |
| 11-01 | 8,000 | 49 reviews |
| 11-06 | 8,000 | 52 ratings, 4.12 |

It's climbing slowly, one rank at a time. Doesn't look like anyone's bought paid installs. More like search traffic that keeps coming in (inferred). Ratings have been sliding, and nearly all the bad reviews complain about the paywall.

### It's not the first one.

The store's "related" section links to another extension, "Video to MP3" (ogoim…): listed Apr 22, 1 30k users in Sep, 8 60k in Oct, and flat at 60k since. Both extensions request the exact same permissions (activeTab, downloads, offscreen, scripting, storage), use the same paywall language, the same "supported page + cloud processing" copy, host their privacy policy on Google Docs, and pushed updates on the same day in late August. The developer account is a different random gmail.

The big one used to live at `youtube-to-mp3`. A review article, "14 Free & Safe YouTube to MP3 Downloader," recommended it as "YouTube to MP3" before it got renamed to its current neutral name. So it's likely the same team: the big listing plateaued at 60k, so they reused the same template under a second account to take another search slot, with the two listings cross-linking in "related" so that if one gets pulled, the other survives. There's no direct evidence they're the same people. This is an inference.

### Where users come from

| Channel | Evidence |
|---|---|
| Local-language store search | The Polish, Spanish, German, Brazilian Portuguese, Indonesian, Russian and Turkish page titles all read "Youtube MP3" (store pages, 11-06) |
| "mp3" keyword ranking | A third-party tracker shows it ranking #12 for the store term "mp3" |
| Cross-linking from the big listing | Both listings link to each other in the store's "related" section |
| Early reviews | Fewer than 800 users as of Aug 19, yet 9 ratings already, two of them long and detailed, which looks seeded (unverified) |

No discussion on X or TikTok, and no press coverage. Few people know it exists, and users basically find it through search on their own.

### Where the money comes from

Free for the first 1 to 2 conversions, then a subscription. The big listing's reviews are blunter: "only 1 free download and you will have to pay for it" (10-02); "you only get like 2 songs until they beg for money" (11-02); one user reported the price as €4.80 a month (10-28).

The backend is probably an open-source tool like yt-dlp wrapped in a cloud service (inferred). Server-side conversion has real costs, which explains the tight free allowance and the reliance on paid conversion. Neither conversion rate nor revenue is public. Assuming 8,000 plus 60k users, with just 1% paying €4.80 a month, the two listings would bring in roughly €3,000+ a month. That's a ballpark estimate only.

### Who it's competing with

| Name | Scale | Difference |
|---|---|---|
| Video to MP3 (the big one) | 60k users, 192 ratings | Nearly identical; very likely the same team |
| YTMP3X – Video to MP3 Converter | Listed 9-23, 328 users, 24 ratings | Copy nearly lifted from "MP3, M4A, Opus or WAV with trimming, cover art and secure cloud processing" |
| YT to MP3 | Listed 10-15, 539 users | Just redirects to a conversion website |
| MP3 Converter, MP3 Converter & Downloader | 60k / 50k | Converts local files and grabs web media; doesn't touch YouTube |
| Sites like y2mate and ytmp3 | Very large (unverified) | Free, lots of ads, you have to copy the link |
| yt-dlp, cobalt.tools | Open source | Free, requires some technical skill |
| YouTube Premium | Big | Offline playback inside the app only; no MP3 file export |

Any of these can match the features (320kbps, cover art, playlists, trimming). What sets this one apart is just one thing: it effectively handles YouTube-to-MP3 conversion, and users can find it in search. That's exploiting a policy gap, not a moat.

### If it were you

**B: Worth a try. You can probably make money, but you're earning on the policy edge, it could be pulled at any time, and people are already copying it.**

**Good fit for:** developers who have shipped a Chrome extension, can run a conversion backend, and can live with one account disappearing one day. Ideally someone already comfortable running several accounts and doing multi-language store optimization.

**Bad fit for:** anyone who wants a durable brand they can put on a resume; anyone uncomfortable with copyright and platform-policy gray zones; anyone who has other extensions under the same developer account and fears getting caught in the crossfire.

**How to do it:**

- Don't go head-to-head with them in English. Their approach is neutral English pages with exact keywords in local-language pages. Target the languages they've done poorly in, or pick a different keyword that's similarly blocked by policy, like downloads from other video sites or subtitle export from a platform.

- Give away a bit more free usage than it does. Its bad reviews are all "only 1–2 uses before you have to pay," which is an obvious opening: try something like 3 free uses a day, pay-per-use, or a one-time purchase.

- Get the features to "good enough" (320kbps, cover art, playlists) and spend your effort on backend stability rather than bells and whistles.

- Prepare two or more accounts running the same code, so if one gets pulled, the other can take over.

**How to get users:** localized store titles and descriptions are the core channel. Then seed a few reviews and tutorial articles into the "YouTube MP3" search results in each language (the big listing already ran a review article). Early ratings have to come from real users.

**When to start:** as early as possible. Between 9 and October, at least three copycats have appeared. The big listing stalled at 60k, and a smaller one stalled for a week at 8,000. Aim to launch before the end of 2026, and check within three months whether you can get past a few thousand users.

**Signs that would mean you read it wrong:**

- The store starts pulling these extensions over localized titles, or it and the big listing vanish together. That means the gap has closed.

- It's stuck at 8,000 while the big one has plateaued at 60k. That suggests the total local-language search volume is this size, and later entrants will split an even smaller pie.

- YouTube tightens anti-download measures and cloud conversion breaks every few days. Backend costs and maintenance load could eat the profit.

### Sources

- Chrome Web Store pages and review pages (English pages plus the hl=pl/es/de/pt-BR/id/ru/tr localized pages), 11-06 read; daily user and rating counts from the store, 11-01 to 11-06.

- 90-day user curves for the two extensions on extops.dev.

- TuneMobie, "14 Free & Safe YouTube to MP3 Downloader."

- Searches on X and TikTok, no results.

- Revenue figures are estimates. Whether these are the same team, and whether the early reviews were solicited, have not been verified.

[Chrome store page ↗](https://chromewebstore.google.com/detail/video-to-mp3-converter/akmpjekooepipiljllifkpmkmobkbhhk)

**Research notes: competitor table, acquisition evidence, full research report**

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| Video to MP3 (ogoimgmekoacpndfanncfplddpjnecjm, original slug youtube-to-mp3) | Chrome | 2026-04-22 | 60k users, 192 ratings | Nearly identical (permissions, copy, paywall wording, update dates all match); very likely the big listing from the same team. This one adds playlists and OPUS/WAV as selling points. |
| MP3 Converter(balvin.perrie) | Chrome | 2019-01-03 | 60k users | Pure JS, encodes local files locally, doesn't fetch online video, free |
| MP3 Converter & Downloader(extfan) | Chrome | 2022-04-26 | 50k users | Converts local and online media to MP3; doesn't focus on YouTube and doesn't target local-language YouTube keywords |
| Audio Downloader Prime | Chrome | 2016-01-19 | 300k users | Sniffs and downloads web audio; policy keeps it from handling YouTube |
| Free Video Downloader – MP4, HD | Chrome | 2025-12-11 | 10k users | Mainly a video / HLS downloader that also extracts audio |
| Conversion sites like y2mate and ytmp3 | Web | Years | Very large (unverified) | Free but full of ads, requires copying and pasting links. This one takes a single click on the page, but charges. |
| yt-dlp / cobalt.tools | Open source | Years | Leading open-source projects | Free, but requires technical skill or manual steps. This product is most likely a paid layer wrapped around a backend like these. |
| YouTube Premium offline downloads | Big-company features | Years | Big | Offline playback inside the app only; no MP3 file export |

Where users come from

- **Verified** **Store search: local-language titles riding YouTube keywords** : On the hl=pl/es/de/pt-BR/id/ru/tr pages the titles are Konwerter/Convertidor/Konverter/Conversor/Конвертер/Dönüştürücü 'Youtube MP3', while the English title is the neutral Video to MP3 Converter

- **Verified** **Store keyword ranking** : Recall records: chrome-stats shows it ranking #12 for the keyword 'mp3'

- Inferred **Twin-account matrix / related-item cross-linking** : Same permissions, copy, and update date (2026-08-25) as the 60k-user ogoim… extension; they link to each other under Related in the store. The developers are different random gmail accounts

- Inferred **SEO review articles** : TuneMobie's 《14 Free & Safe YouTube to MP3 Downloader》 recommends the big account; this one was not found

- Inferred **seeded early reviews** : at 8/19 users, before reaching 800, it already had 9 ratings, two of them detailed

## Why Video to MP3 Converter (Chrome, akmpjekooepipiljllifkpmkmobkbhhk) works

> In one line: the English name doesn't mention YouTube, but 54 local-language store titles all read 'Youtube MP3 Converter'. That's how it captures the Chrome Store search 'YouTube to MP3', a big term the policy crackdown wiped out. The backend is cloud transcoding, with a few free conversions and then Premium (a user quoted about €4.80 per month). It's not a one-off: the same template under another developer account, 'Video to MP3' (ogoim…), has reached 60k users, and this one is the second account.

### 1. Basic data

| items | value | Source |
|---|---|---|
| Published / last updated | 2026-08-05 / 2026-08-25(v1.5.2) | Store page, chromestore library |
| users | 768(8/31) → 1k(9/10) → 2k(9/20) → 4k(10/4) → 5k(10/8) → 6k(10/16) → 7k(10/23) → 8k(11/1); 11/1–11/07 it stayed at 8k | extops.dev single-page 90-day curve; chromestore item_snap |
| Rating | 4.12(52 ratings); 8/31 is 9 ratings, 10/8 is 28 ratings 4.50, and it declines after that (paywall complaints) | extops.dev, item_snap |
| Developer | gaxunawenu81 (gmail.com); not a business, no website, privacy policy hosted on Google Docs | Store page |
| Permissions | activeTab, downloads, offscreen, scripting, storage (no site access declared in the manifest) | chromestore library, extops |
| Paid | Description reads 'a number of free downloads… optional Premium upgrade unlocks unlimited use'; the store listing does not tick in-app purchases | Store description |
| Language | 55 interface languages (the description claims 10) | Store page |

### 2. Competitors

**Inside the Chrome Store** (chromestore library, 2026-11-07 snapshot):

- **Video to MP3** (ogoimgmekoacpndfanncfplddpjnecjm): listed 2026-04-22, 60k users, 192 ratings; 9/1 30k → 10/8 60k, then stuck at 60k (extops). Identical permission set (activeTab/downloads/offscreen/scripting/storage), same paid-feature wording, updated on the same day in Aug 25, same copy ('supported pages + cloud conversion'), privacy policy on Google Docs too; the developer is another random gmail (omasisaho881). The original URL slug was `youtube-to-mp3`; TuneMobie's review article recommends it as 'YouTube to MP3 - Chrome', and the Polish page still reads 'YouTube to MP3 … Konwertuj filmy z YouTube' (Brave search results). **It's basically safe to say this is a big account from the same team, and this one is a copied second account.**

- **MP3 Converter** (balvin.perrie, 2019 years, 60k users): pure JS local encoding, converts local files, does not fetch online videos.

- **MP3 Converter & Downloader** (extfan, 2022 years, 50k): local and online conversion to MP3, adds ID3 tags.

- **Audio Downloader Prime** (2016 years, 300k), **Video & Audio Downloader** (90k), **MP3 Downloader** (30k, 2.7 rating): long-running web media sniffers, cannot download YouTube (store policy).

- **MP4 to MP3 converter** (tapnetic307,2024 yr, 10k) and **Video to Audio** (qatofegapi27,2026-05,1k, 100% local): process local files.

- **Free Video Downloader – MP4, HD** (2025-1.21M, 157 ratings): downloads HLS video and extracts audio as a side feature; the store puts it under this one's 'related' items.

- Downloaders with YouTube in the name barely survive in the store. In the library, the only ones with YouTube/YT plus MP3 in the name are 'YT to MP3' (539 users, which just redirects to the yttomp3.app website) and 'YTofMP3' (1k). The reason: Chrome Web Store policy bans downloading YouTube content.

**Off-store** : conversion sites like y2mate / ytmp3 (wall-to-wall ads, very large traffic, specific numbers unverified), cobalt.tools, the open-source yt-dlp, desktop software like the 4K Video Downloader, and YouTube Premium (offline viewing, but you can't export MP3).

**Conclusion** : this need is far from new. It's one of the oldest big search terms on the internet. But in the Chrome Store, few extensions offer one-click MP3 from a YouTube page, because policy cleared these out. Its room to grow comes from that gap.

### 3. Growth tactics (evidence)

1. **Local-language titles riding the 'YouTube MP3' keyword (confirmed)** : the English name is neutral, 'Video to MP3 Converter', and the description only says 'supported page'. But opening the same page with hl=pl/es/de/pt-BR/id/ru/tr gives titles of 'Konwerter Youtube MP3', 'Convertidor Youtube MP3', 'Youtube MP3 Konverter', 'Conversor Youtube MP3', 'Konverter Youtube MP3', 'Конвертер Youtube MP3', 'Youtube MP3 Dönüştürücü', and the body text uses the same name (Jina read the store page, 2026-11-06). Users who don't speak English can find it by searching 'youtube mp3' in the store or on Google. The metadata across all 55 languages exists to capture local-language search terms.

2. **Store search / related items (confirmed)** : Recall records show chrome-stats ranking it #12 for the keyword 'mp3'. The store's 'related extensions' links it to the big Video to MP3 account (store page Related), so traffic from the big account spills over to it.

3. **Twin-account matrix (likely)** : The big account launched in April and stopped at 60k. In August, the same template was published as a second account under another gmail, and this one is that second account. It takes up more search slots and protects against one account being removed. The recall note said the publisher had 4 other similar tools; our library only captured this one, unverified.

4. **Reviews / SEO articles (big account has them, this one doesn't)** : TuneMobie's 《14 Free & Safe YouTube to MP3 Downloader》 recommends the big account (ogoim…). This one shows no coverage on media, X, or TikTok (x-radar: 90 days, 0 posts; TikTok search for 'youtube to mp3 chrome extension' turned up 0 results).

5. **Early reviews (suspected seeding)** : 8/19 has two detailed positive reviews ('Works great for converting YouTube videos to MP3… batch download is a nice bonus' and 'eliminates the need to rely on external… conversion websites'), written when it had fewer than 800 users but already had 9 ratings. Unverified whether they were bought.

### 4. Why users come and why they pay

- **Why people come** : They want audio files from YouTube (songs, podcasts, lectures). Conversion sites are full of ads and make you copy and paste links. This extension works with one click on the YouTube page, lets you pick 320kbps, keeps cover art and tags, downloads a whole playlist, and trims. Reviews say it outright: 'Works great for converting YouTube videos', 'faster downloads especially from YT' (big account's reviews).

- **Where the money comes from** : Cloud transcoding (the server takes the page link and processes it, probably a yt-dlp-style backend, unverified). Free use is limited to a few conversions (complaints: 'only 1 free download', 'you only get like 2 songs until they beg for money'), then Premium, with one user quoting €4.80/month (big account reviews, 10/28). Server costs are real and the free allowance is very small, so it makes money by converting users.

- **Retention** : Complaints cluster around 'not free' and 'you have to pay for it', and ratings fell from 4.5 to 4.12. New users kept growing after October, so acquisition comes from search and keeps refilling. Whether users stay depends on the paid conversion rate (unknown).

### 5. Differentiation

- **Versus web converter sites** : You click on the page itself, with no wall-to-wall ads, and it has playlist and trim support, but you pay.

- **Versus other MP3 extensions in the store** : Most can only convert local files or sniff media on web pages, and can't handle YouTube. This one uses cloud processing plus local-language titles, effectively offering 'YouTube to MP3'. That's its real differentiator.

- **Is this why it took off?** : Yes. But the differentiation comes from grabbing search terms at the edge of policy, not from a technical moat. The features themselves (formats, cover art, playlists, trimming) are easy for anyone to build, and yt-dlp is open source.

### 6. Visibility and copycats

- **Visibility** : Small circle. No public revenue, no X or press coverage. The big template-sibling account got one SEO review article.

- **Copycats** : **YTMP3X – Video to MP3 Converter** (lpeafpgpbaedgjmeeggmegigfnjdejhf, listed 2026-09-23; 328 users but 24 ratings; copy 'MP3, M4A, Opus or WAV with trimming, cover art and secure cloud processing' is nearly verbatim); **YT to MP3** (2026-10-15,539 users); **Video & Audio Tools** (2026-10-14,223 users). This one is itself a copy of the big account.

### 7. What to borrow

- Big keywords with platform policy limits can be split: the English main page stays neutral to pass review, while the localized titles and descriptions use the real search terms to catch non-English traffic.

- One template across several accounts: it spreads takedown risk, takes up more search slots, and the store's "related" sections cross-link them.

- For tools with real server costs, charge with "a few free uses + subscription."

### 8. Uncertain

- Revenue and paid conversion are unknown; €4.80/month is just one user's claim.

- Whether it's the same team as the big one: permissions, copy, update dates, and privacy policy format all match, but the developer accounts differ, and there's no direct evidence.

- Takedown risk: the localized titles openly say YouTube, which the store could act on at any time. The big one already renamed from youtube-to-mp3, which suggests they're dodging review.

- 11/1's user count has stayed at 8k. It may just not have reached the next tier (9k), or it may have hit its ceiling.

- Whether it runs paid ads: not found (the ad libraries only track listed products).

### Sources

- Chrome Web Store listing pages (including the ?hl=pl/es/de/pt-BR/id/ru/tr localized pages) and review pages, read via Jina Reader, 2026-11-06

- extops.dev/extensions/akmpjekooepipiljllifkpmkmobkbhhk and /ogoimgmekoacpndfanncfplddpjnecjm (90-day curve)

- chromestore library item / item_snap / related / recall 2026-11-07.json

- TuneMobie:[www.tunemobie.com/ytb-music-tips/best-youtube-to-mp3-downloa…](https://www.tunemobie.com/ytb-music-tips/best-youtube-to-mp3-downloader.html)

- Brave Search ogoimgmekoacpndfanncfplddpjnecjm (Polish page title "YouTube to MP3")

- x-radar search, TikHub TikTok search (both 0 results)

This article was written by AI from public data and the data we collect daily. Numbers are sourced, and inferences are labeled.