DUBnSUB provides human-edited subtitling and closed captioning in 70+ languages, delivered as SRT, VTT, SCC, EBU-STL, and TTML for web, OTT, broadcast, and social platforms. Every project includes WCAG-aligned SDH captioning and QC for sync, reading speed, and formatting. Standard turnaround is 24–72 hours depending on volume.
Our Subtitling Services
DUBnSUB delivers end-to-end subtitling and captioning services for entertainment, corporate, education, and social media content. Our workflow combines expert human editors with AI-assisted drafting: AI Captioning and AI Subtitling accelerate high-volume projects with ASR drafts refined by professional linguists, while SDH Subtitling and Audio Description extend access to deaf, hard-of-hearing, blind, and low-vision audiences through speaker IDs, non-speech cues, and voiced narration of on-screen action. Every deliverable is QC’d for sync, reading speed, and formatting before export.
Subtitling services
Expert linguists and QC engineers deliver human‑edited subtitles with precise sync and natural reading flow, using best‑practice limits on line length, reading speed, and two‑line layouts. Deliverables include SRT, VTT, SCC, EBU‑STL/STL, TTML and more, with frame‑accurate timecodes and platform‑ready conformance; formatting and styling are preserved per platform requirements.
Captioning services
Closed captioning includes SDH with speaker IDs, non‑speech cues, and sound effects, meeting WCAG expectations for accurate, synchronized captions for deaf and hard‑of‑hearing audiences. Supports both prerecorded (Level A) and live content (Level AA) to align with common ADA‑related accessibility targets.
Video subtitling service
End‑to‑end workflow: transcription, adaptation, timing, segmentation, and QC to balance fidelity and readability, with checks on reading speed, duration, and positioning. Platform conformance: validated for YouTube, LinkedIn, Instagram, OTT, and broadcast so files publish or re‑cut without rework.
Multilingual subtitling
AI‑assisted subtitle drafts in 70+ languages, edited by human linguists for accuracy, cultural nuance, and readability, with timing tuned to platform rules and broadcast specs. Rapid AI drafts + human QC for natural phrasing and sync WCAG‑aligned practices for accessibility in US markets Supports SRT/VTT for web and SCC/EBU‑STL/TTML for OTT/broadcast
SDH Subtitling
SDH (Subtitles for the Deaf and Hard‑of‑Hearing) include dialogue, speaker IDs, key sound effects, and music cues for equal access on web, OTT, and broadcast. Delivered as SRT, VTT, SCC, and EBU‑STL with frame‑accurate timing Editorial checks for clear cues, pacing, and legibility across devices Aligns with WCAG captioning expectations commonly used for ADA conformance
Audio Description
Professional narration of on‑screen action, text, and scene changes for blind and low‑vision audiences, available open or closed for streaming and broadcast pipelines. Voiced descriptions synced to media; integrated with player controls per Section 508 UX guidance Supports US compliance contexts referencing WCAG 2.x and ADA/Section 508; FCC/CVAA applies for designated programming Suitable for government, education, entertainment, and corporate media at scale
Why choose DUBnSUB
- Editorial excellence: natural phrasing, consistent punctuation, and smart line breaks improve comprehension.
- Readability science: language‑specific segmentation, controlled CPS, and two‑line limits for faster scanning.
- Platform‑ready: validated against platform rules with sync, duration, and format checks pre‑delivery.
- Compliance first: services aligned with WCAG/ADA expectations to reduce risk and broaden access.
What we subtitle
Confidential, end‑to‑end subtitle translation with NDAs, access controls, and privacy‑first workflows across entertainment, corporate, education, social, and virtual formats. Multilingual subtitling and SDH/closed captioning for e‑learning, TV/OTT, webinars, podcasts, and social media videos—delivered as SRT/VTT/SCC/EBU‑STL. A professional captioning company for accessible video captions, corporate video subtitles, and platform‑ready YouTube subtitles service with strict confidentiality.
Pre‑Recorded TV subtitling
Subtitles are timed to locked picture with consistent line lengths, speaker continuity, and broadcast‑safe placement, following captioning rules and editorial standards used for pre‑recorded programming. Deliveries can include STL/SCC and sidecar files ready for network ingest.
Animation subtitling
Subtitles respect rapid scene changes, on‑screen text, and comedic timing, with tight sync to aid comprehension; for character lip‑sync or speech‑driven animation, transcript‑based timing can assist review and revisions.
Online training and e‑learning subtitling
Captions and SDH support comprehension, searchability, and compliance in LMS and webinar replays, aligned with WCAG requirements typically adopted by education providers and enterprises. Files are optimized for clear reading on slides and UI overlays.
YouTube subtitling
Delivered as SRT/VTT with platform‑ready naming, timestamps, and language codes for simple upload and multilingual tracks, preserving readability on mobile and TV apps. Guidance follows common two‑line limits, timing, and placement practices.
Webcasts subtitling
Live or near‑live captions improve accessibility and engagement for corporate announcements and virtual events, with sidecar files and recordings prepared for on‑demand playback. Workflows prioritize accuracy, latency control, and viewer legibility.
Music videos subtitling
Lyric‑accurate timing and SDH cues capture musical intros, beats, and non‑speech sounds, with readable pacing and lead‑ins suited to fast cuts or karaoke‑style displays when requested.
Podcasts subtitling
Short clips and audiograms gain reach with burned‑in captions or sidecars, optimized for silent autoplay and platform formats; clear hooks and legible text increase completion and conversion.
Social media videos subtitling
Two‑line, high‑contrast captions are tested across aspect ratios and devices to protect legibility, with mobile‑friendly timing and safe‑area placement for reels, stories, and feeds.
Explainer videos subtitling
Product and brand explainers use concise phrasing, consistent terminology, and timing tuned to demos and UI moments, improving clarity for global and muted‑play environments.
Broadcast subtitling (TV & film)
Compliant STL/SCC with proper timecode bases and positioning ensures ingest readiness for TV and OTT, with QC against network specs and regulatory guidelines before delivery.
Formats and delivery
| Format | Best for | Notes |
|---|---|---|
| SRT | YouTube, social, general web | Most widely supported; lightweight |
| VTT | HTML5 web players | Supports cue metadata/styling |
| SCC | US broadcast, OTT | Frame-accurate timecodes |
| EBU-STL / STL | European broadcast, OTT | Positioning + code page support |
| TTML / DFXP / IMSC | Streaming platforms | Timed-text standard for OTT ecosystems |
Accessibility and compliance
- WCAG captions: accurate, synchronized captions for prerecorded media at Level A, and for live streaming at Level AA, with SDH cues for non‑speech information.
- Policy alignment: many organizations use WCAG 2.0/2.1/2.2 to meet ADA expectations; using the latest WCAG guidance helps ensure durable accessibility.
Frequently Asked Questions
How much do subtitles cost per minute?
Subtitle pricing depends on factors such as the target language, audio quality, subtitle complexity, SDH requirements, and required delivery formats. Web-ready formats such as SRT and VTT are generally more straightforward, while OTT and broadcast deliverables such as STL and SCC may cost more because they require additional formatting, timing, and technical conformance.
What's the difference between subtitles and closed captions?
Subtitles primarily focus on translating or displaying dialogue. Closed captions include everything subtitles provide, along with non-speech information such as speaker identification, sound effects, music cues, and other relevant audio information. Closed captions are designed to improve accessibility for deaf and hard-of-hearing audiences.
Are captions required for training content?
Captions are strongly recommended for training content, particularly when it is prerecorded or publicly accessible. WCAG guidance includes requirements for captions on prerecorded and live content, depending on the applicable conformance level. Many organizations target WCAG Level AA for training and public-facing content to support accessibility and common ADA-related requirements.
Is SRT a good format for most platforms?
Yes. SRT is one of the most widely supported subtitle formats for websites, YouTube, social media, and other general-purpose video platforms. For best results, subtitles should use a clear two-line layout, controlled reading speed measured in characters per second (CPS), and timing optimized for mobile viewing. Broadcast and OTT platforms may require formats such as STL or SCC instead.
Do OTT platforms need STL or SCC?
Many broadcast and OTT workflows require EBU-STL or SCC rather than SRT or VTT. These formats can support requirements such as precise subtitle positioning, code pages, and frame-accurate timecodes that may be required by specific broadcast networks and streaming platform ingest systems. However, exact format requirements vary by platform and delivery specification.
