Does Subformer upload my subtitle file?

No. The subtitle editor runs entirely in your browser. Files you open are parsed locally in JavaScript and never transmitted to any server.

Which subtitle formats can I edit?

Both WebVTT (.vtt) and SubRip (.srt) are supported for import and export. The editor auto-detects the format on import, and you choose VTT or SRT at export time - so it doubles as a VTT-to-SRT and SRT-to-VTT converter.

Do I need to sign up or create an account?

No account is required. The subtitle editor is free to use without signup or login.

Will my edits persist if I refresh the page?

Yes. Your working set is saved to your browser's local storage and automatically restored the next time you open the editor. Use the Clear button to discard it.

Can I convert a VTT file to SRT (or SRT to VTT)?

Yes. Upload the source file (either format), then click the matching Download button - the editor converts between VTT and SRT automatically when exporting.

How do I fix subtitle timing that is out of sync?

Click a cue's start or end time to edit it directly (HH:MM:SS.mmm), or drag the edge of the cue block on the timeline. The timeline also highlights overlaps.

Does the editor support word-level or karaoke-style subtitles?

The editor treats each cue as an atomic unit for editing. For karaoke-style per-word highlighting, generate a word-level VTT using our AI subtitle translation workflow in the Subformer dashboard, then fine-tune it here.

Can I translate subtitles into another language?

This free tool is for hand-editing existing subtitle files. For automatic AI-powered translation of video subtitles into 100+ languages, create a free Subformer account and use the translation workflow in the dashboard.

Is there a file size or cue count limit?

There is no server-side limit because nothing is uploaded. Practically, the editor handles thousands of cues in modern browsers; very large files may slow down the timeline but remain usable.

Is Subformer's subtitle editor open source?

The editor itself is closed source, but the underlying subtitle formats (WebVTT, SubRip) are open standards - you can always take your edited file to any other tool.

Subformer

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Editor Subtitulorum Online Gratuitus pro VTT & SRT

Edite fasciculos subtitulorum WebVTT et SubRip directe in navigatro tuo. Tempora in linea temporali visuali corrige, cues iunge vel divide, inter formatos converte, et resultatum descarga - nihil umquam uploadatur.

Incipe emendare subtitula

Subiice fasciculum .vtt vel .srt, insere contentum, aut ex novo incipe. Omnis editio fit in navigatro tuo — nihil oneratur.

Quomodo subtitulos per interrete emendare

01
Transfere fasciculum aut insere textum
Depone fasciculum .vtt vel .srt, insere textum subtituli, aut incipe a documento vacuo.
02
Emenda textum et tempora
Emenda singula signa in situ. Corrige tempora scribendo ea vel trahendo margines in linea temporis.
03
Demitte ut VTT vel SRT
Exporta rursus ad formatum originale aut converte inter VTT et SRT - omnia localiter.

Omnia quae opus sunt ad subtitula emendanda

Linea temporis visualis cum ingranditione

Vide omne segmentum in linea horizontali. Clicca ut transias, trahe margines ut tempora reordines, Ctrl/⌘ + rotula volve ad ingrandendum et opus per imaginem accurate facias.

Reverte, Itera, Salvatio automatica

Omnis emendatio revocabilis est (⌘Z / ⌘⇧Z). Sessio praesens automatice servatur in navigatro tuo ut possis tabulam claudere et postea redire.

Privatum ex consilio

Interpretatio, editio et exportatio omnia in tuo navigatro fiunt. Fasciculi numquam de tuo dispositivo exeunt - nulla oneratio, nulla vestigatio, nulla registratio.

Conversor VTT ↔ SRT

Subiice fasciculum WebVTT et descende SubRip — vel e converso. Editor differentias inter formatos automatice administrat.

Coniungere et dividere segmenta

Coniunge duo signa in unum vel adde signum novum inter cuiuslibet paria. Tempora automatice a signis vicinis adaptantur.

Monitiones de superpositione

Signa quae incipiunt priusquam precedente desinat in linea temporis signantur, ut possis quaestiones temporis corrigere ante exportationem.

WebVTT vel SubRip (SRT): quem uti debes?

Ambae formae idem significant — signa temporalia textūs — sed in parvis particularitatibus differunt.

WebVTT (.vtt)

Nativum in elementis HTML5 <track>. Sustinet classes styli, positionem, et capita metadatorum. Notae temporales punctum ante millisecondas utuntur (e.g. 00:00:01.500). Optima electio pro lusoribus video per interrete et recentioribus navigatoribus.

SubRip (.srt)

Forma antiquissima et maxime late sustentata — operatur in VLC, YouTube, Premiere, DaVinci Resolve, et plurimis editoribus video desktop. Textus simplex, comma loco puncti ad millisecondas (e.g. 00:00:01,500). Elige SRT ad maximam compatibilitatem.

Quis hunc editorem subtituli utitur?

Auctores contentorumEmenda titulos a intelligentia artificiali creatos antequam in YouTube, TikTok, vel Instagram poneas.
Educatores et discipuliAdapta titulos lectionis ut accessibilitatem improves aut verba male recognita corrigas.
TraductoresAperi SRT in lingua originaria, verte cue per cue, et exporta eodem formato.
Turmae AccessibilitatisCorrige derivationem temporis et dictionem in titulis ut normas WCAG impleas.

Editor Subtitulorum Online Gratuitus pro VTT & SRT

Quomodo subtitulos per interrete emendare

Transfere fasciculum aut insere textum

Emenda textum et tempora

Demitte ut VTT vel SRT

Omnia quae opus sunt ad subtitula emendanda

Linea temporis visualis cum ingranditione

Reverte, Itera, Salvatio automatica

Privatum ex consilio

Conversor VTT ↔ SRT

Coniungere et dividere segmenta

Monitiones de superpositione

WebVTT vel SubRip (SRT): quem uti debes?

WebVTT (.vtt)

SubRip (.srt)

Quis hunc editorem subtituli utitur?

Quaestiones saepe rogatae

Interpres Subtitulorum AI

Interpres Video AI

Editor video per interrete

Quomodo subtitulos per interrete emendare

Transfere fasciculum aut insere textum

Emenda textum et tempora

Demitte ut VTT vel SRT

Omnia quae opus sunt ad subtitula emendanda

Linea temporis visualis cum ingranditione

Reverte, Itera, Salvatio automatica

Privatum ex consilio

Conversor VTT ↔ SRT

Coniungere et dividere segmenta

Monitiones de superpositione

WebVTT vel SubRip (SRT): quem uti debes?

WebVTT (.vtt)

SubRip (.srt)

Quis hunc editorem subtituli utitur?

Quaestiones saepe rogatae

Num Subformer fasciculum subtituli mei transmittit?

Quos formatos subtituli possum emendare?

Num necesse est mihi subscribere aut rationem creare?

Manebuntne meae emendationes si paginam renovas?

Possumne fasciculum VTT in SRT convertere (vel SRT in VTT)?

Quomodo emendo discrepantiam temporum subtituli?

Possumne subtitula in aliam linguam vertere?

Estne limitatio magnitudinis fasciculi aut numeri segmentorum?

Instrumenta correlata a Subformer

Interpres Subtitulorum AI

Interpres Video AI

Editor video per interrete