DevToys.pro: 400% international traffic growth across 52 languages

The numbers

The complete localization — every label, tooltip, and description across the entire DevToys.pro tool set — was translated in a single batch: 5,838,788 tokens across 4,477 OpenAI requests, for a total spend of $58.44. No subscription, no per-seat TMS pricing — one upload, one payment, one download.

The challenge

Developer tools have a global audience, but an English-only interface quietly filters it. A developer searching in Spanish for “convertidor JSON a YAML” or in Japanese for “JSON フォーマッター” is far more likely to land on — and stay on — a page that speaks their language. For a content-rich tools site, that translates directly into search visibility: every localized page is a new set of indexable, keyword-relevant URLs in a language with far less competition than English.

Translating a UI of this size by hand, or running it through a full translation management system with a monthly subscription, was hard to justify for an indie project. The strings also had to come back in the exact JSON structure the app already used, with every interpolation placeholder preserved — not a loose spreadsheet export.

How LocalePack helped

The DevToys.pro source locale file was uploaded to LocalePack, which detected the format, counted tokens, and priced the job up front. It then translated the full string set into all 52 supported languages and returned ready-to-ship locale files in the same structure — placeholders intact, keys in sync across every language.

• One file in, all locales out. No per-language copy-paste, no manual file wrangling — the translated locales dropped straight into the existing i18n setup.
• Structure and placeholders preserved. Interpolation tokens and nested keys came back exactly as they went in, so the app rendered correctly in every language without code changes.
• Pay-once economics. The entire 52-language translation cost $58.44 as a one-time job — not a recurring platform bill.

The results

After shipping the 52-language UI, DevToys.pro saw international organic traffic grow by 400%. Localized pages started ranking for native-language queries in markets the English-only site had never reached, and visitors who arrived in their own language stayed and engaged instead of bouncing.

Takeaway

For a content- and UI-heavy web app, reaching an international audience isn’t a massive engineering project — it’s mostly a translation problem. DevToys.pro solved it for the price of a team lunch and turned its interface into 52 doorways for global developers to find it in their own language.