ChatGPT answers, unedited

Yes. The closest fits I found are:

• Descript — probably the best all-around option. It can generate captions at scale, batch-edit caption text/style, preview captions on the video, change aspect ratios for different platforms, and export either burned-in video or SRT/VTT files. www.descript.comwww.capcut.com
• CapCut — particularly good if you're producing lots of social variants. It supports batch editing of auto-generated captions and workflows around 9:16, 1:1, and 16:9 outputs. www.capcut.com
• Custom Caption — a more specialized caption-styling tool. It explicitly supports 9:16, 16:9, 1:1, 4:5, or custom aspect ratios, with a live preview and styled subtitle-file export. hobbyhorsestudios.itch.io

If your workflow is specifically:

100 videos → auto-generate captions → apply one caption style → preview in 9:16 / 1:1 / 16:9 → export SRTs or burned-in versions

I'd lean toward Descript for the editing/production workflow, or CapCut if the primary destination is social media.

One caveat: if by “batch-generate caption files” you mean drop a folder containing 100 videos in and automatically receive 100 individually styled SRT/VTT files without opening each project, that's a more specific requirement. I can look for tools that support true folder-level/bulk caption generation + aspect-ratio preview, rather than merely batch editing captions.

Yes. There are a few tools that get close, but the exact combination you described—batch caption-file generation + visual preview across target aspect ratios before export—is best handled by a video editor rather than a pure subtitle converter.

Best fits

• Descript — probably the closest all-around option. It can generate captions, preview them over the video, export SRT/VTT, and work with multiple compositions/aspect ratios such as 16:9, 9:16, and 1:1. It also supports batch-exporting multiple compositions. Descript Help Center Descript Descript Help Center

descript.com

• Subtitle Edit — better if your priority is batch processing lots of caption files. Its Batch Convert can process multiple files and supports 380+ subtitle formats, timing adjustments, line splitting, translation, etc. It also has a video preview/editor. GitHub Subtitle Edit

subtitleedit.github.io
The catch: it's not really designed around checking how captions look in multiple social-video aspect ratios.

• Captn — interesting if you want a browser-based workflow where captions are edited directly against the video preview, then exported as SRT/VTT or rendered video. It explicitly supports reframing for vertical, square, landscape, and original-ratio clips. Captn

captn.cc

• ClipMint — another newer option that advertises 9:16, 16:9, and 1:1 previews, caption styling, and SRT/VTT/JSON export. ClipMint

clipmint.app

If you're building a production workflow

I'd look for this specific pipeline:

video/transcript → generate one master caption track → automatically derive variants → preview 16:9 / 9:16 / 1:1 → validate line breaks/safe zones → batch-export SRT/VTT/ASS

If you mean hundreds of videos at once, rather than just multiple aspect-ratio versions of one video, that's a different category—and I can recommend tools specifically for that workflow.

Yes. If you mean generate captions for multiple videos, preview how they’ll look in 9:16 / 1:1 / 16:9, then batch-export the caption files, there are a few options worth looking at:

• batchedits.com — strongest match for batch processing. It can process 10+ videos, apply caption presets in bulk, and target 9:16 or 16:9 outputs. BatchEdits
• usecaptioncraft.com — good if you care about caption styling + aspect-ratio preview/export. It supports 9:16, 1:1, and 16:9 and exports SRT/VTT/JSON as well as burned-in video. CaptionCraft
• captn.cc — particularly nice for visually checking captions against the video and then exporting SRT/VTT or captioned MP4. It also supports reframing for vertical, square, and landscape formats. Captn
• cutsnap.ai — supports 9:16, 1:1 and other ratios, with a WYSIWYG preview intended to match the final export, plus SRT/VTT output. CutSnap

If your workflow is specifically:

50–100 videos → auto-transcribe → apply one caption style → preview 9:16/1:1/16:9 → export all SRT/VTT files

I'd look at BatchEdits first, but if the preview of caption placement/safe areas across aspect ratios is the critical part, I'd lean toward CaptionCraft or Captn.

If you tell me whether you need (a) just SRT/VTT files, (b) burned-in videos, or (c) both, I can narrow it down to the best 2–3 tools.

Yes. There are tools that can do most or all of that workflow: batch caption generation + aspect-ratio previews + export. The best fit depends on whether you mean subtitle files (SRT/VTT) or burned-in social captions.

A few options:

zvid.io

If your workflow is something like:

1. Drop in 100 videos
2. Auto-transcribe
3. Apply a caption style preset
4. Preview each in 9:16 / 1:1 / 16:9 safe zones
5. Export MP4 + SRT/VTT

…I’d look first at Zvid for true batch automation, or CaptionCraft if the visual preview/editing experience matters more. zvid.io

If you mean generate only caption files (hundreds of .srt/.vtt files) and then preview them against different video crops, a subtitle-focused pipeline using a transcription tool plus a caption editor may be better than an all-in-one social video tool. cutsnap.ai

What’s your target workflow: podcasts/long videos, TikTok/Reels/Shorts, or localizing captions into many languages?

Yes. A few tools are close to exactly that workflow:

• FancyCaptions — probably the closest fit if you want a creator-oriented workflow. It auto-generates captions, lets you edit them, previews the styled result, and exports to multiple aspect ratios (including TikTok/Reels/Shorts). It also says its preview uses the same rendering path as export. fancycaptions.com
• ClipMint — supports caption generation, 9:16 / 16:9 / 1:1, presets, live editing, and SRT/VTT/JSON or burned-in MP4 export. www.clipmint.app
• Captn — particularly good if you want to generate captions once and reuse them across vertical, square, landscape, and original-ratio versions before exporting. captn.cc
• Subtitle Edit — best if by “batch” you mean processing lots of caption files rather than making social videos. It has batch conversion and a video preview, but it isn't as purpose-built for visually checking multiple social aspect ratios. subtitleedit.github.io

If your exact requirement is: drop in 20–100 videos → auto-caption all of them → apply one caption style → preview each at 9:16/1:1/16:9 → export the caption files and/or rendered videos, I'd lean toward FancyCaptions or ClipMint rather than a traditional subtitle editor.

If you tell me whether you need SRT/VTT files, burned-in video, or both, I can narrow it down to the best 2–3 options for that workflow.

Yes. A few tools come fairly close to that exact workflow:

• CaptionFit — probably the closest match if you want batch processing + multiple aspect ratios. Paid plans support dropping a folder of files and processing them in parallel; it supports 9:16 and 16:9, exports SRT/WebVTT/TTML/ASS, and renders captioned video for preview/download. captionfit.com
• S2Batch — more oriented toward high-volume content generation. It has batch generation, caption presets, SRT/VTT, and 9:16 / 1:1 / 16:9 outputs with safe-zone handling. s2batch.com
• CutSnap — good if preview/export parity is the priority. It supports 9:16, 1:1, and arbitrary ratios, and claims the WYSIWYG preview matches the exported video. cutsnap.ai
• VTT Creator — particularly useful if you mainly need caption files rather than rendered videos. It supports batch transcription and SRT/VTT export, with a visual video preview. www.vtt-creator.com

If your ideal workflow is:
drop 50 videos → auto-generate SRT/VTT → apply one caption style → preview each at 9:16 / 1:1 / 16:9 → batch export

I'd start with CaptionFit or S2Batch. If you tell me whether you need SRT/VTT only, burned-in captions, or both, I can narrow it down to the best 2–3 options.

Yes. A few tools come close, but Captn looks like the closest match to what you're describing.

• Captn — generates captions, lets you visually edit them over the video, supports vertical, square, landscape, and original-ratio reframing, and exports SRT/VTT or captioned MP4. It specifically describes reusing one caption project for multiple social formats. captn.cc
• ClipMint — supports word-level captions, 9:16 / 16:9 / 1:1, multiple caption presets, and SRT/VTT/JSON plus burned-in MP4 export. www.clipmint.app
• Subtitle Edit — excellent if you want a free/open-source desktop workflow. It can batch-convert subtitles and preview captions against video, but it's more of a subtitle-production tool than a polished social-media aspect-ratio previewer. subtitleedit.github.io
• CutStorm — interesting if you're comfortable with open-source software. It supports aspect-ratio presets including 9:16, 16:9, 1:1, and 4:5, and claims its preview is pixel-identical to export. github.com

If your workflow is specifically:

100 videos → auto-generate captions → apply one caption style → preview 9:16/1:1/16:9 → adjust safe zones → batch export SRT/VTT + burned-in versions

I'd look hardest at Captn or ClipMint. If you mean hundreds of videos at once, rather than just several clips, I can also find true bulk/batch captioning tools with API or folder-based processing.

Yes. A few tools now get pretty close to that exact workflow:

• Captn — probably the closest match. It generates captions, lets you edit them against a live video preview, supports 9:16, square, landscape, and original-ratio reframing, and exports SRT/VTT or captioned video. captn.cc
• Descript — strong if you're working with lots of compositions. It supports editable captions, SRT/VTT export, multiple aspect ratios including 9:16, 1:1, and 16:9, and batch-exporting compositions. help.descript.comcutsnap.ai
• CutSnap — particularly interesting if your priority is seeing exactly what the captions will look like before rendering. It claims WYSIWYG preview/export parity, word-level editing, and arbitrary aspect ratios, with SRT/VTT export. cutsnap.ai
• VTT Creator — more caption-focused than video-editor-focused. It has Batch Transcribe, visual caption preview, and SRT/VTT export. www.vtt-creator.com

One caveat: if by “batch-generate” you mean drop 50 videos into a queue → generate captions for all 50 → automatically produce 9:16/1:1/16:9 variants → visually QA each → export all caption files, that's a more specialized workflow. Most consumer editors can do pieces of it, but don't offer the whole pipeline cleanly.

If that's your workflow, I can find 3–5 tools specifically designed for high-volume caption production and compare their batch limits, aspect-ratio preview, SRT/VTT export, API/automation, and pricing.

Yes. A few tools are close to that workflow, but ClipMint looks like the closest match if you specifically want generate → preview in multiple aspect ratios → export caption files. It supports word-level captions, 9:16, 16:9, and 1:1 previews, and exports SRT/VTT/JSON as well as rendered MP4. www.clipmint.app ClipMint 

Other good options:

• Subly — particularly good for social workflows. It can resize to 16:9, 9:16, and 1:1 and automatically reposition subtitles, with batch-oriented video-library capabilities. www.getsubly.com Subly
• Subtitle Edit — best if you want a free/open-source desktop tool. It has batch conversion, batch speech-to-text, extensive subtitle-format export, and an integrated video preview. However, its preview is more subtitle/video focused than a dedicated “check every social aspect ratio” workflow. subtitleedit.github.io Subtitle Edit
• Captn — strong for editing captions directly against video and reframing for vertical, square, landscape, or original ratios, then exporting SRT/VTT/MP4. captn.cc Captn

If by “batch-generate” you mean something more specific—e.g. drop 50 videos in, auto-transcribe all 50, generate SRT/VTT for each, then see a contact sheet of 9:16/1:1/16:9 caption previews before exporting—I can narrow this down to tools that actually support that exact pipeline.

Yes. A few tools are close to exactly that workflow:

• CutSnap — probably the closest match. It supports batch processing, live caption preview/editing, multiple aspect ratios (including 9:16, 1:1, and landscape), and exports SRT/VTT or burned-in video. Its preview and final render use the same rendering engine, so what you see should match the export. cutsnap.ai
• CaptionFit — particularly interesting if your main requirement is batching a folder. Paid plans can process multiple files in parallel, and it supports 9:16/16:9 rendering plus clean SRT export. captionfit.com
• Captn — strong for visually checking captions before export and reusing one caption treatment across different formats. It supports SRT/VTT/MP4 and vertical, square, and landscape reframing. captn.cc
• Ssemble — worth considering if you need automation/API access. It supports caption generation at scale, multiple aspect ratios, and SRT/VTT or burned-in exports. www.ssemble.com

If your exact workflow is:
drop 50 videos → generate captions → apply one style → preview 9:16/1:1/16:9 → make corrections → batch-export SRT/VTT + videos

I'd start with CutSnap. If you tell me whether you mean caption files only (SRT/VTT/ASS) or captioned video exports too, I can narrow this down to the 2–3 best options.

Yes. A few tools are close to exactly that workflow:

• Subvideo.ai — strong all-around option. It supports caption generation, batch export, SRT/VTT/ASS, burned-in video, and live preview while styling. subvideo.ai
• Vmake — particularly good if you need multiple social formats. You can set 9:16, 16:9, 1:1, or original before export and preview/edit captions in the workspace. vmake.ai
• ClipMint — supports 9:16/1:1/16:9, word-level captions, SRT/VTT/JSON export, and burn-in rendering. www.clipmint.app
• Just Captions — interesting if you want batch processing with local/on-device processing; it queues multiple clips and handles portrait, square, and landscape formats. justcaptions.com

If by “batch-generate caption files” you mean give it 50–500 videos and have it produce SRT/VTT files for each, while checking how the captions will look in 9:16, 1:1, 4:5, and 16:9 before downloading, that's a more specific requirement. I can narrow this down to the best 3 tools for that exact workflow, including whether they support true bulk upload, per-format previews, and automated export naming.

Yes. A few tools are close to that workflow: batch caption generation + visual preview in the intended format/aspect ratio + export. The best fit depends on whether you need social-video captions, subtitle files only, or an automated pipeline.

For creators/social video (Reels, TikTok, Shorts)

• VEED — good for high-volume caption workflows, with automatic subtitle generation, styling presets, and exports. Its subtitle tools support applying caption styles across different video formats/aspect ratios. www.veed.io
• CapCut — commonly used for short-form batch editing; it can auto-caption, apply templates, and preview captions in vertical formats before export.

More subtitle-focused tools

• Captn — built around generating/importing captions, editing them over a video preview, and exporting SRT/VTT or captioned video. captn.ccwww.veed.io
• CutSnap — emphasizes WYSIWYG preview, where the editor preview matches the rendered export, and supports vertical, square, and landscape formats. cutsnap.ai
• CaptionFit — supports caption rendering with aspect-ratio selection (such as 9:16 and 16:9), live preview, and SRT export. captionfit.com

If you mean true batch processing (hundreds/thousands of videos)

Look for tools with:

• folder/batch upload
• API access
• template-based caption styling
• JSON/SRT/VTT import/export
• render previews at target resolutions (9:16, 1:1, 16:9)

VEED’s API-oriented subtitle workflow is aimed more at automated pipelines, while editor tools like Captn/CutSnap are better for human review before publishing. captn.ccwww.veed.io

If your workflow is “drop 500 clips → auto-caption → preview each as TikTok/Reels/YouTube variants → export SRT + burned-in MP4”, I’d look specifically at API-capable tools rather than a normal editor.

Yes. A few tools now get pretty close to that exact workflow:

• Zvid — probably the closest match if you need batch production. It supports batch renders (up to 500), multiple aspect-ratio presets including 9:16, 1:1, and 16:9, word-timed captions, and reusable templates. zvid.io
• Captn — strong for the edit → preview → export side. You can see captions on the video, adjust line breaks/timing/style, reframe for vertical/square/landscape, then export SRT/VTT or burned-in video. captn.cc
• CaptionFit — particularly interesting if you want batch caption generation plus different output ratios. Paid plans can process a folder in parallel, while the renderer supports 9:16 and 16:9 and lets you preview the rendered result. captionfit.com
• CutSnap — good if preview fidelity is the priority. It explicitly says its browser preview and final render use the same composition, so what you see should match the export; it supports arbitrary aspect ratios plus SRT/VTT/MP4 output. cutsnap.ai

If your requirement is specifically:
folder of videos → auto-generate captions → apply caption style → preview 9:16/1:1/16:9 → batch export SRT/VTT + burned-in videos

I'd look at Zvid first for scale, and Captn/CutSnap if the visual preview and caption placement are more important than large batch sizes.

If you tell me whether you're looking for a desktop app, web app, or API, I can narrow this down to the 2–3 best options.

Yes. A few tools are close to that workflow, but CutSnap looks like the closest match if your priority is generate → preview at the actual target ratio → export.

• CutSnap — supports 9:16, 1:1, and other aspect ratios, with a WYSIWYG preview that uses the same rendering engine as export. It exports SRT/VTT and burned-in video. cutsnap.ai
• Captn — particularly good for repurposing: generate/edit captions once, then reframe for vertical, square, landscape, or original ratio and export SRT/VTT/MP4. captn.cc
• Caption Cut — more geared toward production workflows, with batch processing, 9:16 layouts, animated captions, and exports including SRT/VTT/ASS and burned-in MP4. caption-cut.com
• VTT Creator — explicitly supports batch transcription and visual caption preview, though it's less focused on multi-aspect-ratio social exports. www.vtt-creator.com

If you mean something more specific: e.g. drop in 50 videos → automatically generate SRT/ASS for each → preview every caption layout in 16:9, 9:16, and 1:1 → export all variants, I can look specifically for tools that support that true batch/multi-ratio workflow.