Free browser-based subtitle tools let you convert and edit SRT/VTT files privately

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A developer has launched a free suite of subtitle utilities under the project Lazyblink, designed to run entirely in the browser without uploading files to any server. The toolset supports SRT and VTT format conversion, plain-text transcript extraction, and caption timing adjustments to fix sync issues. Because all processing is handled client-side via JavaScript, no backend infrastructure is required and files never leave the user's device. The developer built the tools to address common frustrations with existing online subtitle services, which often require signups, add watermarks, or store user files remotely. The tools are available at lazyblink.com/subtitle-tools with no registration or cost required.

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