PostWireHow to post the same video to TikTok, Instagram Reels and YouTube Shorts at once
A vertical 9:16 clip (1080×1920, MP4 or MOV) under 60 seconds is accepted by all three as a TikTok, a Reel and a Short without re-editing. What should change per network is the words around it — that is the part PostWire writes for you.
Updated . Written from PostWire's own code; vendor prices read on Oct 1, 2026. Live networks: TikTok, Instagram, YouTube, LinkedIn (personal profiles), Facebook Pages, Bluesky, Mastodon, Telegram, Discord, and X on paid plans.
Step by step
- Export one vertical video
9:16, 1080×1920, MP4 or MOV. Keep it under 60 seconds and it works as a TikTok, a Reel and a Short. PostWire publishes the file as uploaded — no cropping or re-encoding of video.
- Create a free PostWire account
Open postwire.io/dashboard.html, type your email and press Create my free account. PostWire emails you a link to confirm the address; connecting accounts and publishing unlock once it is confirmed. No password and no card (free plan: 1 business, 20 posts a month, 5 AI drafts a day (about 20 a month), 2 networks per post, 3 scheduled posts at a time — every network connects free, no card).
- Connect TikTok, Instagram and YouTube
Open Accounts, press Connect on each network and then Continue to TikTok (or Instagram, YouTube). You sign in on the network itself and come straight back; PostWire never sees your password and you do not need your own developer app — PostWire's TikTok, Meta and Google approvals cover it. Instagram needs a Business or Creator account, connected through the Facebook Page it is linked to; if several are linked, you pick which one.
- Add the video and tick the three networks
Go to Compose. In Your idea write one line about the video (what it shows, who it's for). Under Post to tick TikTok, Instagram and YouTube, then drop the file on Add photos or a video. On Instagram a video goes out as a Reel; you can also pick Reel (vertical video) under More options → Instagram & Facebook format.
- Press Write the posts and edit the drafts
Each network gets its own draft: a hook-first TikTok caption, a shorter Instagram caption, and for YouTube a title (up to 100 characters), a description, SEO tags and Visibility on YouTube. Every draft shows a character counter and can be edited, shortened or regenerated.
- Answer TikTok's settings, then publish or schedule
TikTok requires you to choose Who can view this video (Everyone, Friends, Followers or Only me) — there is no default. Then press Publish now, or Schedule, pick a date and time and press Add to queue. Each network returns its own result and link; a failed one carries the network's own error and what to fix.
Automating it? The same thing is one REST call: POST https://postwire.io/api/post with {"platforms":["tiktok","instagram","youtube"], "video_url":"…", "title":"…", "text":"…", "privacy":"public"}. Through the API, TikTok posts are private unless you send a privacy value. See the n8n version and the API reference.
Tools that publish one video to all three, compared
Prices read on each vendor's pricing page on Oct 1, 2026. Where PostWire is ahead is below the table.
| Tool | Free plan | TikTok on the free plan | Cheapest paid plan | Writes a different caption per network |
|---|---|---|---|---|
| PostWire | Yes — 1 business, 20 posts a month, 5 AI drafts a day (about 20 a month), 2 networks per post, 3 scheduled posts at a time — every network connects free, no card | Yes | $9/mo (3 businesses, every network in each post) | Yes, from one idea, in one step |
| Buffer | Yes — 3 channels, 10 scheduled posts per channel | Not listed | Essentials: $5 per channel a month, billed yearly | Caption by caption, with its AI assistant (our Sept 26 review) |
| Upload-Post | Yes — 2 profiles, 10 uploads a month | No | $24/mo (Basic, 5 profiles) | Partly — from a video, for 4 networks, as a separate call (our Sept 26 review) |
| Repurpose.io | 10 free videos, no card; 14-day trial | Not listed | $35/mo (Starter, up to 3 accounts per network) | Not listed |
| Blotato | No — 7-day trial (without the API) | No | $29/mo (Starter, 20 accounts) | On request in its chat (our Sept 26 review) |
Checked on Oct 1, 2026 (2026-10-01) on each vendor's own pricing or docs page, linked in the first column and below. Monthly billing in USD unless noted. "Not listed" means we could not find it on their page, not that it is missing.
Where PostWire is ahead
- Each network's words written for you: from one upload, a hook-first TikTok caption, a shorter Instagram caption and a YouTube title, description and tags, in one step. Buffer's AI assistant goes caption by caption; Upload-Post's AI starts from the video, for 4 networks, in a separate call; Blotato rewrites on request in its chat.
- TikTok on the free plan. Upload-Post's free plan leaves TikTok out, and Blotato has no free plan.
- All three networks for $9 a month (Starter: 3 businesses, every network in each post). Upload-Post Basic is $24, Blotato Starter $29 and Repurpose.io Starter $35.
- No video yet? Make a video from this post turns the caption into an 8–12 s vertical video, on every plan, with no AI credits.
- Buffer pricing (free plan, API on free): buffer.com/pricing
- Upload-Post plans and free-plan networks (their llms-full.txt): www.upload-post.com/llms-full.txt
- Repurpose.io pricing: repurpose.io/pricing/
- Blotato pricing: www.blotato.com/pricing
Why not post the exact same caption everywhere?
Because each network reads the text differently. TikTok and Instagram allow 2,200 characters but show only the first line; YouTube indexes a title of up to 100 characters, a description and tags; Instagram keeps at most 30 hashtags. The same clip with three captions written for each is the normal way creators post — PostWire just writes the three versions from one line so you only review them. All limits are on social media post sizes.
No video yet, only an idea? Make an image from this post turns the draft's own words into a clean 4:5 or 9:16 image, so TikTok (photo post) and Instagram can still publish it.
Questions people ask
Can I post to TikTok, Instagram Reels and YouTube Shorts at the same time?
Yes, with a tool that publishes through each network's API. In PostWire you upload the video once, tick the three networks and press Publish now (or Schedule); each network gets its own caption and returns its own link.
Will Instagram post my video as a Reel?
Yes. On Instagram, PostWire publishes a video as a Reel (a photo goes to the feed). You can also choose Reel or Story under More options → Instagram & Facebook format. Instagram needs a Business or Creator account.
Does YouTube treat it as a Short?
YouTube decides that from the video: a vertical clip under 60 seconds is shown as a Short. PostWire uploads it through the YouTube Data API with the title, description, tags and visibility you set.
Is TikTok included on the free plan?
Yes. PostWire's free plan is 1 business, 20 posts a month, 5 AI drafts a day (about 20 a month), 2 networks per post, 3 scheduled posts at a time — every network connects free, no card. A post counts once per network, so one video to two networks uses 2 of the 20.
How big can the video be?
Up to 1 GB per file in the dashboard and the API (files over 50 MB upload in parts). Through the n8n node's binary input the cap is 50 MB; for larger files pass a public URL.
Does PostWire support X, Threads or Pinterest?
Not yet. The live networks are TikTok, Instagram, YouTube, LinkedIn (personal profiles), Facebook Pages, Bluesky, Mastodon, Telegram and Discord.
Try it on one business, free.
The free plan is 1 business, 20 posts a month, 5 AI drafts a day (about 20 a month) and 2 networks per post — every network connects free, no card, no time limit. Paid plans start at $9 a month and have a 14-day refund; Pro can be tried free for 7 days, with a card at checkout and nothing charged that day.