---
title: "Free language study tools · NoaLingua"
description: "Free language-learning tools from NoaLingua: merge two subtitle files into one bilingual file, or plan your study time. Both run in the browser, no account."
url: "https://noalingua.com/tools/"
language: "en"
modified: "2026-09-15"
license: "CC BY 4.0 — https://creativecommons.org/licenses/by/4.0/"
---
Tools

# Free tools for studying a language

Small utilities that open without an account

NoaLingua’s free tools run entirely inside the page. The dual subtitle maker pairs two subtitle files by their timing and saves one bilingual file; the study time calculator turns a routine into hours and shows its arithmetic. Neither needs an account or sends what you enter to a server.

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Subtitles

## Dual subtitle maker

Merge two subtitle files into one bilingual .srt, .vtt, .ass or Anki file, paired by timing rather than by line number.

Open the subtitle maker →](https://noalingua.com/tools/dual-subtitle-maker/)[

Planner

## Language study time calculator

Turn minutes, sessions and weeks into a total plan, then divide the time between input, review and speaking.

Open the calculator →](https://noalingua.com/tools/language-study-time-calculator/)

Prefer evidence to planning? Explore the [open Language Data Index](https://noalingua.com/research/language-data-index/) or choose a concrete routine from the [study-path library](https://noalingua.com/study-paths/).