# CAPTD

> CAPTD turns a finished photo into a platform-ready set of captions, hashtags, audio suggestions, hooks, alt text and voiceover scripts, built for photographers. It runs in the browser with no signup, login or email required.

CAPTD was built by Marco Obinu, a working TV cameraman and street/landscape photographer. It solves one narrow problem: photographers who can compose and shoot a frame in seconds often stall for twenty minutes in front of an empty caption box. CAPTD is the writing half of that, not the shooting half.

Signing up is optional and only adds one feature — History, which saves generated Content Packs to an account so you can revisit them across devices. Generation works exactly the same with or without an account.

## Product

- [Homepage](https://www.captd.app/): what CAPTD does, plus the Content Pack generator
- [Full guide](https://www.captd.app/guide): Content Packs, the four workspaces, the free tools suite and the Interactive Advisor, explained
- [Pricing](https://www.captd.app/pricing): plans and what each one includes
- [About](https://www.captd.app/about): who built CAPTD and why
- [FAQ](https://www.captd.app/faq): signup, accounts, supported platforms, privacy

## Workspaces

- Normal: a single photo to a full content pack for one platform
- Video: the same, for a video clip
- Slideshow: the same, for a multi-photo slideshow or carousel
- Spotlight: content packs aimed at a photography business, driven by a 7-field marketing profile, plus Episode mode for podcast and YouTube promotion

## Free photography tools

- [Tools index](https://www.captd.app/tools): every calculator, planner and utility
- Technical calculators: depth of field, exposure, hyperfocal distance, ND filter, field of view, crop factor, flash power
- Light and environment: golden hour, blue hour, Milky Way, moon, sun position and sunrise/sunset planners
- Timing and execution: timelapse, hyperlapse, long-exposure and star-trail planners
- AI photo assistant: exposure, composition, colour and sharpness analysis, plus scene recognition and lens-settings help
- Photographer utilities: 12 genre shot-list checklists, a shot planner, a camera-settings diary, and nearby photography events

## Free photography business tools

All run in the browser: no upload, no AI, no account. Legal templates are labelled "template, not legal advice".

- [Photography Business Tools](https://www.captd.app/tools/business): the category index
- [Model Release Form](https://www.captd.app/tools/business/model-release-form): editable release for adults or minors (signed by a parent or guardian), optional clauses, PDF download
- [Photography Contract Template](https://www.captd.app/tools/business/photography-contract-template): plain-English services agreement — fee, deposit, cancellation, delivery, copyright, liability — editable, PDF download
- [Photo Licence Agreement](https://www.captd.app/tools/business/photo-licence-agreement): licence for personal, editorial or commercial use — period, territory, exclusive or not, fee, credit line, releases, AI-training clause; copyright stays with the photographer; editable, PDF download
- [Photography Quote Builder](https://www.captd.app/tools/business/photography-quote-builder): line items, discount, VAT/sales tax and deposit totalled in the currency's minor unit, PDF quote with your logo
- [Day & Hourly Rate Calculator](https://www.captd.app/tools/business/rate-calculator): revenue = costs + take-home ÷ (1 − tax rate), divided by billable days or hours
- [Client Questionnaire Templates](https://www.captd.app/tools/business/client-questionnaire): wedding, portrait and product questionnaires, editable, PDF with answer lines or copied text
- [Batch Photo Watermark](https://www.captd.app/tools/business/photo-watermark): text or logo watermark, nine positions or tiled, up to 50 photos, ZIP download

## Free podcast and YouTube tools

All run in the browser: no upload, no AI, no account.

- [Podcast & YouTube tools](https://www.captd.app/tools/podcast): the category index
- [YouTube Chapters Checker](https://www.captd.app/tools/podcast/youtube-chapters-checker): checks timestamp lines against YouTube's chapter rules (first at 00:00, at least 3, ascending, each at least 10 s) and reformats them
- [Subtitle Converter](https://www.captd.app/tools/podcast/subtitle-converter): SRT to WebVTT and back, or either to a plain-text transcript with optional [mm:ss] markers
- [Show Notes Template Builder](https://www.captd.app/tools/podcast/show-notes-template): one form to show notes for Apple Podcasts, Spotify and YouTube, with a character count against each platform's limit
- [Episode Title Checker](https://www.captd.app/tools/podcast/episode-title-checker): title length against YouTube (100) and Apple Podcasts Connect (150) limits, keyword position, episode numbers, with a score
- [Speaking Time Calculator](https://www.captd.app/tools/podcast/speaking-time-calculator): words to speaking time and back at 120, 150 or 180 words per minute, or your own pace
- [Episode Ready Checker](https://www.captd.app/tools/podcast/episode-ready-checker): integrated loudness against Apple Podcasts' -16 LUFS (±1), true peak (≤ -1 dBTP), clipping, dead air, level consistency, format, sample rate and bit depth
- [YouTube Tag Generator](https://www.captd.app/tools/podcast/youtube-tag-generator): tag ideas from a title and keywords, counted the way YouTube counts its 500-character tag field (commas count; a tag with a space counts as quoted)
- [Podcast Name Generator](https://www.captd.app/tools/podcast/podcast-name-generator): clear, playful and brandable show-name ideas from word lists and patterns (no AI), with Apple Podcasts and Spotify search links
- [YouTube Thumbnail Checker & Resizer](https://www.captd.app/tools/podcast/youtube-thumbnail-checker): against YouTube's current rules (3840 × 2160 recommended, 16:9, min width 640, JPG/PNG, 50 MB from a computer, 2 MB from the phone app); small-size preview; 16:9 copy under either limit

## Free social media tools

All run in the browser: no upload, no AI, no account. Platform values from each platform's own help or developer pages, checked 21 October 2026; where a platform publishes nothing the tool says "not published".

- [Free Social Media Tools](https://www.captd.app/tools/social): the category index
- [Caption Length Checker](https://www.captd.app/tools/social/caption-length-checker): one caption against Instagram (2,200, 5 hashtags, 20 @), TikTok (2,200 UTF-16), YouTube (5,000 bytes), LinkedIn (3,000), Pinterest (800), X (280 weighted, links 23), Bluesky (300 graphemes / 3,000 bytes), Threads (500, emoji in bytes, 1 topic tag), Mastodon (500, links 23); Facebook publishes no limit
- [Hashtag Generator](https://www.captd.app/tools/social/hashtag-generator): tags from your own words and place plus real photography-niche tags; Instagram up to 5 per post, YouTube ignores all past 60, X recommends 2
- [UTM Link Builder](https://www.captd.app/tools/social/utm-link-builder): GA4 campaign parameters (source, medium, campaign always; content, term, id, source_platform, creative_format, marketing_tactic) with GA4's Organic/Paid Social channel rules
- [Content Calendar Template](https://www.captd.app/tools/social/content-calendar): dated posting plan from posting days and rotating content pillars; CSV, .ics calendar file and PDF
- [Engagement Rate Calculator](https://www.captd.app/tools/social/engagement-rate-calculator): by followers, reach and impressions side by side; X and LinkedIn define it per impression, Instagram publishes no rate
- [Poll Maker](https://www.captd.app/tools/social/poll-maker): checks a poll against X and Threads (4 answers, 25 characters), LinkedIn (140 / 30), YouTube (4, 65), Mastodon (4, 50); Instagram's sticker limits are not published
- [Giveaway Comment Picker](https://www.captd.app/tools/social/giveaway-picker): pasted comments (no login), one entry per person, tag and keyword rules, winners and alternates drawn with crypto.getRandomValues; Meta, Instagram and X promotion rules summarised
- [Social Media Image Sizes & Resizer](https://www.captd.app/tools/social/image-sizes): published image sizes for Instagram (feed 1080 wide, 1.91:1 to 3:4), Facebook, X, LinkedIn, Pinterest, YouTube, TikTok, Threads, Bluesky, Mastodon (checked 21 Oct 2026; ad-only specs labelled, unpublished ones said so); crop and resize to any exact size, under the file-size limit
- [Instagram Grid Maker](https://www.captd.app/tools/social/instagram-grid-maker): one photo into a 3-across profile grid (1–4 rows) or a 2–5 slide carousel panorama, tiles numbered in posting order, ZIP
- [Photo Collage Maker](https://www.captd.app/tools/social/photo-collage-maker): 2–9 photos in 8 layouts at 1:1, 4:5, 9:16 or 16:9 with gap, border and per-photo framing; JPEG, no watermark
- [Before and After Maker](https://www.captd.app/tools/social/before-after-maker): two photos as a looping wipe-transition MP4 (H.264 via WebCodecs, 6–10 s) or a side-by-side / stacked PNG

## Free tools for selling your work

All run in the browser: no upload, no AI, no account. Etsy figures from Etsy's own fees and payments policies, checked 21 October 2026.

- [Free Tools for Selling Your Work](https://www.captd.app/tools/sell): the category index
- [Profit Margin Calculator](https://www.captd.app/tools/sell/profit-margin-calculator): profit, margin and markup from cost and price, or the price for a target margin (cost ÷ (1 − margin))
- [Markup Calculator](https://www.captd.app/tools/sell/markup-calculator): price, profit and the real margin for a markup, with a table of common markups
- [Break-Even Calculator](https://www.captd.app/tools/sell/break-even-calculator): units to cover fixed costs and to reach a target profit (fixed ÷ (price − cost per item), rounded up)
- [Etsy Fee Calculator](https://www.captd.app/tools/sell/etsy-fee-calculator): listing 0.20 USD (per item sold), 6.5% transaction on item + shipping + gift wrap, payment processing by country (US 3% + 0.25 USD, UK 4% + 0.20 GBP, DE/FR/IT/ES/NL 4% + 0.30 EUR, CA and AU 3% or 4% + 0.25), regulatory operating fee (e.g. UK 0.48%, FR 1.14%), Offsite Ads 15%/12% (cap 100 USD), 2.5% currency conversion, VAT on fees; price for a target profit
- [Product Description Template](https://www.captd.app/tools/sell/product-description-template): physical and digital templates to a listing description; Etsy title up to 140 characters, 13 tags of up to 20 characters
- [Batch Image Resizer](https://www.captd.app/tools/sell/batch-image-resizer): up to 50 photos by longest side, width, exact size (crop or fit); JPEG/PNG; ZIP; Etsy 2000 px preset
- [Wedding Vendor Credit List](https://www.captd.app/tools/sell/wedding-vendor-credits): suppliers' roles, names, @handles and websites as a caption block (Instagram's 20 @-tag limit checked), a blog list or plain text
- [Wedding Day Timeline Template](https://www.captd.app/tools/sell/wedding-timeline): a schedule that counts back and forward from a pinned ceremony time; editable, PDF or text

## Free audio and music tools

All run in the browser: no upload, no AI, no account. Loudness and true peak per ITU-R BS.1770-4, loudness range per EBU Tech 3342; platform targets from Spotify's and Apple's own help pages (YouTube and Apple Music publish none).

- [Free Audio Tools](https://www.captd.app/tools/audio): the category index
- [Loudness Meter & Streaming Preview](https://www.captd.app/tools/audio/loudness-meter): LUFS, true peak, LRA, PLR, and the gain Spotify (Normal/Loud/Quiet) and Apple Podcasts apply
- [Clipping Checker](https://www.captd.app/tools/audio/clipping-checker): runs of 3+ full-scale samples, with times, on a waveform
- [Waveform Viewer & Image Maker](https://www.captd.app/tools/audio/waveform-image): waveform view and PNG export, bars or wave, any size, transparent background
- [Mono Compatibility Check](https://www.captd.app/tools/audio/mono-check): loudness lost in mono, correlation, out-of-phase share, channel balance
- [Silence Checker](https://www.captd.app/tools/audio/silence-check): silence at the start and end (music) or dead air anywhere (podcasts)
- [Audio Polish](https://www.captd.app/tools/audio/audio-polish): podcast voice (-16 LUFS), music loudness match (-14 LUFS, peak limit only) or social clip; up to 10 minutes; WAV download. Not mastering.
- [Free Music Release Tools](https://www.captd.app/tools/music): the category index
- [Track Ready Checker](https://www.captd.app/tools/music/track-ready-checker): a track against Spotify's delivery (FLAC/PCM WAV, ≥44.1 kHz, 16/24-bit, stereo) and loudness guidance (true peak < -1 dBTP, < -2 if louder than -14 LUFS)
- [Music Release Checklist](https://www.captd.app/tools/music/release-checklist): steps from master to release day dated from the release date; Spotify pitching at least 7 days ahead (Release Radar), Countdown Pages for albums/EPs with 3,000+ monthly listeners
- [Album Cover Size Checker & Resizer](https://www.captd.app/tools/music/album-cover): against Spotify (640–10,000 px, sRGB), Apple Music (4000 × 4000 on its artist page, RGB), YouTube Music (≤ 4098), Bandcamp (≥ 1400); crop and resize to 4000 × 4000
- [Spotify Canvas Size Checker & Maker](https://www.captd.app/tools/music/spotify-canvas): 9:16, 720–1080 px tall, 3–8 s, MP4 or JPG; makes a silent 594 × 1056 MP4 from a video or photo
- [Lyric Video Maker](https://www.captd.app/tools/music/lyric-video-maker): song + LRC/SRT/VTT or tap-synced lyrics + cover art → MP4 (16:9, 1:1, 9:16), up to 10 minutes; exports the timing as LRC
- [EPK Template](https://www.captd.app/tools/music/epk-template): electronic press kit as a PDF — bio, release, highlights, press, shows, links, contact, press photo
- [Online Metronome](https://www.captd.app/tools/music/metronome): 20–300 BPM, accents, time signatures, subdivisions, scheduled on the Web Audio clock
- [Tap BPM](https://www.captd.app/tools/music/tap-bpm): tap tempo with outlier rejection, half/double time, note-length delay times

## Reference library

- [Glossary](https://www.captd.app/glossary): 80 terms grouped by area — 40 core photography terms and 40 creator terms — each defined in plain English, with an example, related terms and a link to the free tool it relates to; platform figures cite the platform's own page with the date checked
  - Photo files: [EXIF Data](https://www.captd.app/glossary/exif-data), [Metadata Stripping](https://www.captd.app/glossary/metadata-stripping)
  - Photo business (releases & licensing; not legal advice): [Model Release](https://www.captd.app/glossary/model-release), [Image Licence](https://www.captd.app/glossary/image-licence), [Editorial vs Commercial Use](https://www.captd.app/glossary/editorial-vs-commercial-use), [Exclusive Licence](https://www.captd.app/glossary/exclusive-licence), [Usage Territory](https://www.captd.app/glossary/usage-territory), [Royalty-Free vs Rights-Managed](https://www.captd.app/glossary/royalty-free-vs-rights-managed), [Credit Line](https://www.captd.app/glossary/credit-line)
  - Selling your work: [Profit Margin](https://www.captd.app/glossary/profit-margin), [Markup](https://www.captd.app/glossary/markup), [Break-Even Point](https://www.captd.app/glossary/break-even-point), [Etsy Transaction Fee](https://www.captd.app/glossary/etsy-transaction-fee), [CMYK vs RGB](https://www.captd.app/glossary/cmyk-vs-rgb)
  - Social media: [Alt Text](https://www.captd.app/glossary/alt-text), [Engagement Rate](https://www.captd.app/glossary/engagement-rate), [Reach vs Impressions](https://www.captd.app/glossary/reach-vs-impressions), [UTM Parameters](https://www.captd.app/glossary/utm-parameters), [Carousel Post](https://www.captd.app/glossary/carousel), [Reel](https://www.captd.app/glossary/reel), [Aspect Ratio](https://www.captd.app/glossary/aspect-ratio), [Hashtag](https://www.captd.app/glossary/hashtag)
  - Podcast & YouTube: [Show Notes](https://www.captd.app/glossary/show-notes), [Chapters (Podcast and YouTube)](https://www.captd.app/glossary/chapters), [Audiogram](https://www.captd.app/glossary/audiogram), [Podcast RSS Feed](https://www.captd.app/glossary/podcast-rss-feed), [YouTube Tags](https://www.captd.app/glossary/youtube-tags)
  - Music release: [Spotify Canvas](https://www.captd.app/glossary/spotify-canvas), [Pre-Save](https://www.captd.app/glossary/pre-save), [EPK (Electronic Press Kit)](https://www.captd.app/glossary/electronic-press-kit), [ISRC](https://www.captd.app/glossary/isrc), [BPM (Beats per Minute)](https://www.captd.app/glossary/bpm), [Lyric Video](https://www.captd.app/glossary/lyric-video), [LRC File](https://www.captd.app/glossary/lrc-file)
  - Audio: [LUFS](https://www.captd.app/glossary/lufs), [True Peak (dBTP)](https://www.captd.app/glossary/true-peak), [Loudness Normalisation](https://www.captd.app/glossary/loudness-normalisation), [Clipping (Audio)](https://www.captd.app/glossary/audio-clipping), [Mono Compatibility](https://www.captd.app/glossary/mono-compatibility), [Sample Rate and Bit Depth](https://www.captd.app/glossary/sample-rate-and-bit-depth)
- [Academy](https://www.captd.app/academy): structured lessons across beginner, advanced and professional tiers
- [Gear guides](https://www.captd.app/gear): lens-per-genre and camera-settings guides
- [Troubleshooting](https://www.captd.app/troubleshooting): fixes for common "why does my photo look wrong" problems
- [Shot-list checklists](https://www.captd.app/shot-lists): pre-shoot checklists by genre

## Policies

- [Privacy policy](https://www.captd.app/privacy)
- [Terms of use](https://www.captd.app/terms)
- [Contact](https://www.captd.app/contact)