Free online social media tools
Schedule posts, run AI video utilities, and use instant browser tools for captions, threads, and hashtags. Built by Postmixr for creators who ship on time.
Video tools
Free online AI video tools for subtitles, virality scoring, highlights, and shorts.
Free AI Video Subtitle SRT VTT Generator
Free auto subtitle generator: paste a YouTube, TikTok, or Instagram link or upload a file. Export SRT, VTT, and TXT captions with AI. No software download.
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Free AI Video Virality Analyzer - TikTok & Reels Score
Free viral video analyzer: upload or paste a link, get a 0–100 virality score, hook strength, retention risk, and full transcript. TikTok, Reels, and YouTube Shorts.
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Free AI Video Highlights Extractor - Best Moments
Free AI video highlights generator: extract the best moments from YouTube, TikTok, or uploads. Timestamps, JSON/CSV export, and ranked clip picks.
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Free Auto Shorts Generator - YouTube to TikTok Clips
Free Opus Clip alternative: turn long YouTube videos into vertical 9:16 TikTok, Reels, and Shorts with burned-in captions. Paste a link or upload.
Open tool →Scheduling tools
Free to scheduleDraft posts for Instagram, TikTok, YouTube, X, LinkedIn, and more. Sign up free to connect accounts and publish on schedule.
Free Social Media Scheduler & Poster
Free online social media scheduler and poster: draft one post and schedule it to X, Instagram, LinkedIn, TikTok, Pinterest, Facebook, Threads, and YouTube from one screen.
Open tool →Free Twitter Scheduler
Free Twitter scheduler with a 280-character meter, reply controls, and media attachments. Plan tweets, then publish from Postmixr on schedule.
Open tool →Free Twitter Thread Scheduler
Free Twitter thread scheduler: chain up to 25 tweets with per-tweet character counters, reply controls, and a publish time. Schedule from Postmixr.
Open tool →Free YouTube Video Scheduler
Free YouTube video scheduler: draft title, description, tags, category, visibility, and publishAt before upload. Schedule long-form uploads from Postmixr.
Open tool →Free YouTube Shorts Scheduler
Free YouTube Shorts scheduler: upload vertical video under 60 seconds, draft title and description, and schedule Shorts from Postmixr.
Open tool →Free LinkedIn Post Scheduler
Free online LinkedIn post scheduler for personal profiles and company pages: 3,000-char limit, media, visibility, and publish time in one form.
Open tool →Free TikTok Post Scheduler
Free online TikTok scheduler: caption, privacy, comments / duet / stitch, brand disclosure, and publish time before you ever open the TikTok app.
Open tool →Free Pinterest Pin Scheduler
Free online Pinterest pin scheduler with title (100), description (500), board ID, alt text, and destination link. Plan a week of pins in minutes.
Open tool →Free Pinterest Board ID Finder
Free online Pinterest board ID finder. Paste any Pinterest board URL and get the numeric board ID required by the Pinterest API and scheduling tools.
Open tool →Free Instagram Post Scheduler
Free Instagram feed photo scheduler: draft a caption, alt text, first comment, and publish time, then schedule from Postmixr on the official Graph API.
Open tool →Free Instagram Reels Scheduler
Free Instagram Reels scheduler: upload vertical video, draft a caption, set cover image and publish time, then schedule Reels from Postmixr.
Open tool →Free Instagram Carousel Scheduler
Free Instagram carousel scheduler: plan multi-image or mixed-media carousels with caption, alt text, and publish time, then schedule from Postmixr.
Open tool →Free Instagram Story Scheduler
Free Instagram Story scheduler: plan 9:16 photo or video Stories with caption and publish time, then schedule from Postmixr.
Open tool →Free Threads Post Scheduler
Free online Threads scheduler with a 500-character meter, reply control, media options, and publish time. Plan replies and threads from your browser.
Open tool →Free Facebook Post Scheduler
Free online Facebook Page scheduler. Draft a post (text, image, video, or link) and schedule from one form, no Meta Business Suite required.
Open tool →Instant tools
No signup requiredCharacter counters, image size guides, UTM builder, and more — everything runs in your browser.
Social Media Character Counter
Free online Instagram, TikTok, and Threads character counter with emoji-aware limits. Check caption length before you schedule. No signup.
Open tool →Social Media Image Sizes Cheat Sheet
Free online cheat sheet for Instagram post size, TikTok video dimensions, YouTube thumbnails, and more. Reference for creators. No login.
Open tool →UTM Link Builder
Free online UTM link builder for Instagram, email, and paid ads. Add campaign tags and copy your trackable URL in one click.
Open tool →Thread Splitter for X & Threads
Free online thread splitter for X and Threads. Split long posts into 280 or 500 character chunks with smart sentence breaks. No signup.
Open tool →LinkedIn Text Formatter
Free online LinkedIn text formatter for bold and italic Unicode posts. No extension needed. Copy and paste into LinkedIn instantly.
Open tool →YouTube Title Character Counter
Free online YouTube title character counter (100 max) with search truncation preview. Check length before upload. No signup.
Open tool →Hashtag Generator for Instagram & TikTok
Free online hashtag generator for Instagram and TikTok from your niche keywords. Curated lists, no AI. Copy in one click.
Open tool →Caption Templates & Ideas
Free online Instagram caption templates for hooks, carousels, CTAs, and educational posts. Copy, customize, and publish.
Open tool →Best Time to Post on Social Media
Free online guide to the best time to post on Instagram, TikTok, LinkedIn, and more by timezone. Reference chart for smarter scheduling.
Open tool →Profile Picture Converter
Free online tool to turn any logo or photo into a 1024×1024 profile picture for Instagram, X, LinkedIn, TikTok, and more. Pick a background, download instantly. No signup.
Open tool →CSV Bulk Schedule Validator
Free online CSV validator for bulk post scheduling (caption + ISO datetime per line). Line-by-line errors before you import to Postmixr.
Open tool →Free online SEO tools for social media creators
Use the scheduling tools above to draft Instagram, TikTok, YouTube, and X posts, then sign up free to publish on schedule. Instant tools below run entirely in your browser — no account required for character counters, image size guides, and UTM links.
Start with the Instagram character limit counter, thread splitter, and social media image sizes. Marketers can build trackable links with the UTM link builder, validate bulk CSVs with the schedule CSV checker, and plan timing with best time to post.
Postmixr is a scheduling workspace for Instagram, TikTok, YouTube, Facebook, Threads, and Pinterest. These tools use the same limits and formats as our product, validate here, then schedule from one calendar.
Scheduling guides
Schedule Instagram Reels, schedule YouTube Shorts, schedule Instagram posts, schedule TikTok videos, bulk schedule across platforms, and our social media calendar template.
Who these tools are for
See use cases for solopreneurs, agencies, and e-commerce brands.