Preview your posts, check safe zones, and format content with confidence — free and private.
Free, privacy-first tools for social media creators and marketers. Preview post cutoffs, check vertical video safe zones, and format text for LinkedIn, TikTok, Instagram, YouTube, and X — completely inside your browser.
Essential Formatters, Safe Zones & Writing Tools
Handcrafted utilities to help you spot cutoffs, test vertical video safe zones, resize video clips, and polish your writing before publishing — 100% private in your browser.
Post Polish & Cliché Checker
Paste your draft LinkedIn, X, or Threads post to spot repetitive openers, tired clichés, formulaic contrast phrases, and excessive punctuation before you hit publish. Write with a fresh, authentic human voice that readers actually enjoy.
Comment & Reply Polisher
Check your comments and replies before posting to catch generic praise, tired filler phrases, and low-relevance patterns. Stand out in discussions with authentic, conversation-starting insights.
Channel Monetization & Originality Advisor
Review your video format against current YouTube Shorts and TikTok originality guidelines. Identify potential risks with repetitive footage, unedited stock media, or low-value automation to protect your channel monetization.
All-in-One Social Post Previewer
Stop switching between apps. Preview your caption cutoffs, image aspect ratios, and video safe zones for LinkedIn, TikTok, Instagram Reels, and YouTube Shorts all in one clean view.
Platform AI Labeling Guide
A clear, straightforward guide to when and how to label synthetic or AI-assisted content across TikTok, YouTube, Meta, and Google Ads according to their official policies.
Private In-Browser Video Resizer
Quickly convert video clips to TikTok 9:16, Instagram Feed 4:5, and LinkedIn 16:9 with smooth background blur fill — 100% locally in your browser with zero cloud uploads.
Live Platform Policy & Format Updates
Automated weekly verification of official guidelines across TikTok, Meta, YouTube, and LinkedIn so your safe zones and rules remain 100% current.
- →Weekly automated checks against official specs
- →Monitors TikTok, Meta, YouTube & LinkedIn
- →Ensures zero-delay updates for creator tools
Frequently Asked Questions About Post Formatting & Safe Zones
Why do social media apps cut off my post text with '...see more'?
On mobile devices, apps like LinkedIn truncate text at around 140 characters, while desktop displays roughly 210 characters. Instagram, Threads, and X also enforce strict visual line limits. If your primary hook is pushed below the fold, readers scroll past without expanding. Our previewers simulate exact mobile cutoffs so you can hook your audience before the click.
What are vertical video safe zones and why do they matter?
When you upload vertical 9:16 videos on TikTok, Instagram Reels, or YouTube Shorts, platform interface elements (like like buttons, comments, captions, sound titles, and profile links) overlay the edges of the video. If your subtitles or titles fall inside these danger zones, viewers can't read them. Our safe-zone visualizers overlay the real interface graphics so you keep your critical content visible.
Are these tools really free and do they store my text or video files?
Yes, 100% free with no account registration required. All formatting, image cropping, and video processing runs locally in your web browser using HTML5 Canvas and client-side JavaScript. Your text drafts and video clips are never transmitted to an external server or stored anywhere.
Why doesn't Instagram or LinkedIn let me add clean blank lines?
Both Instagram and LinkedIn historically collapse consecutive empty lines or strip whitespace characters when published from standard text fields. Our formatting tools replace fragile line breaks with invisible, non-collapsing Unicode separators, keeping your paragraph spacing crisp and readable on all devices.
Who created The Social Media Kit?
The Social Media Kit is an independent project created and maintained by Junior (juniorxk), a web developer and creator tired of paywalled, ad-bloated conversion portals. It's built for creators, social media managers, and digital writers worldwide.
Select Your Social Media Network
Choose any tool below to launch an instant interactive editor calibrated to that platform's exact rules and screen layout.
Writing & Polish Tools (2)
Updated for current 2026 rules and mobile viewportsPost Polish & Cliché Checker
Free in-browser tool to polish draft posts for LinkedIn, X, and Threads. Spot tired clichés, repetitive phrasing, and robotic patterns for cleaner, more engaging writing.
Comment & Reply Polisher
Free tool to polish comments and replies for LinkedIn and X. Avoid generic one-liners and spam-folding by crafting thoughtful, high-value discussion points.
Video & Growth Tools (2)
Updated for current 2026 rules and mobile viewportsChannel Monetization & Originality Advisor
Free diagnostic tool to evaluate YouTube Shorts and TikTok channel formats against 2026 originality guidelines to safeguard monetization and channel standing.
Private In-Browser Video Resizer
Free in-browser video resizer for TikTok, Instagram, YouTube, and LinkedIn. Convert to 9:16, 4:5, and 16:9 with blur fill and download as a .ZIP — 100% private with no uploads.
Formatting & Preview Tools (1)
Updated for current 2026 rules and mobile viewportsGuidelines & Rules Tools (1)
Updated for current 2026 rules and mobile viewportsLinkedIn Tools (5)
Updated for current 2026 rules and mobile viewportsLinkedIn Post Formatter & Truncation Previewer
Preview where your LinkedIn feed post will truncate with 'see more' on mobile (~140 chars) and desktop (~210 chars). Format clean line breaks for maximum viral reach.
LinkedIn Carousel & Slide PDF Aspect Ratio Checker
Verify your LinkedIn carousel slide dimensions and aspect ratios (1:1 square or 4:5 vertical) before uploading as a document PDF post to prevent blurry crops.
LinkedIn Profile Banner Cropper & Overlap Indicator
Crop and resize images to exactly 1584x396px for LinkedIn profile headers while avoiding the profile avatar overlap zone on desktop and mobile.
LinkedIn Article Reading Time & Word Estimator
Calculate reading time, word count, and speaking duration for LinkedIn Pulse articles and long-form thought leadership newsletters.
LinkedIn Company Page Cover Cropper (1128x191px)
Resize and crop corporate branding art to exactly 1128x191px for LinkedIn Company Page headers with instant lossless download.
TikTok Tools (5)
Updated for current 2026 rules and mobile viewportsTikTok Safe Zone Checker & 2026 UI Overlay
Test your videos against TikTok's 2026 feed UI overlay. Ensure captions, side like icons, and audio marquees don't cover essential text or faces.
TikTok Bio Character & Emoji Limit Counter
Count characters for your TikTok profile bio with precision multi-byte emoji warning indicators. Stay under the strict 80-character limit.
TikTok Caption Line Breaker & Zero-Width Space Formatter
Fix messy bunched captions on TikTok! Convert normal line returns into zero-width spaces for readable paragraph formatting without periods or symbols.
TikTok Title Hook & Hashtag Separator
Separate engaging main video titles from bulk hashtag lists to ensure your primary hook remains above TikTok's truncation threshold.
TikTok Series & Playlist Title Validator
Check character limits for TikTok Series and Playlist names. Stay within the concise 25-character constraint for profile organization.
Instagram Tools (8)
Updated for current 2026 rules and mobile viewportsInstagram Caption Line Break Generator
Add clean paragraph spaces and formatting to Instagram photo captions and bio sections with zero awkward periods or awkward dashes.
Instagram Reels Safe Zone Overlay Tool
Overlay the Instagram Reels interface on your video frames. Ensure like icons, audio titles, and captions don't obscure critical graphics.
Instagram Grid Maker (3x1, 3x2, 3x3 Photo Splitter)
Slice a single panoramic image into a stunning 3x1, 3x2, or 3x3 Instagram profile grid pattern and download all pieces instantly in a ZIP archive.
Instagram Bio Link & Text Truncated Previewer
Test your 150-character Instagram profile bio. Preview line formatting and discover exactly where long website links or descriptions truncate.
Instagram Carousel Multi-Aspect Ratio Cropper
Resize and standardize photos for Instagram Carousels in 1:1 square, 4:5 vertical, or 9:16 vertical modes to avoid forced automated crops.
Instagram Story Highlight Cover Circular Cropper
Align and crop icons perfectly inside a circular mask for Instagram Story Highlight covers. Export high-def circular PNGs instantly.
Instagram Collab Post Dual-Author Header Previewer
Preview how dual author names and co-creator handles will look on Instagram Feed cards and header layouts before launching a Collab post.
Instagram Broadcast Channel Title & Emoji Validator
Check character lengths and emoji formatting for Instagram Broadcast Channel titles and promotional invites. Stay under the 100-char threshold.
YouTube Tools (6)
Updated for current 2026 rules and mobile viewportsYouTube Shorts Safe Zone Inspector & UI Overlay
Verify your vertical videos against the YouTube Shorts UI overlay. Prevent subscription buttons, sound buttons, and titles from blocking your graphics.
YouTube Chapter & Timestamp Auto-Formatter
Generate valid YouTube video timeline chapters instantly. Automatically verify mandatory '00:00' start points and chronological timestamp sequencing.
YouTube Thumbnail Checker (1280x720 & 2MB File Limit)
Check YouTube video thumbnail dimensions (1280x720) and receive instant warning alerts if your image file exceeds YouTube's strict 2MB limit.
YouTube Channel Banner Safe Area Resizer (2560x1440)
Preview YouTube channel art across Television (2560x1440), Desktop (2560x423), and Mobile smartphone safe zones to prevent clipped logos.
YouTube Title Cutoff Checker & CTR Previewer
See where YouTube video titles cut off (~70 chars on desktop, ~50 on mobile). Optimize keywords and hooks to maximize Click-Through Rate.
YouTube Community Post 1:1 Image Cropper
Crop and format photos to optimal 1:1 square dimensions (1080x1080px) for YouTube Community Tab polls, announcements, and image uploads.
X / Twitter Tools (6)
Updated for current 2026 rules and mobile viewportsX / Twitter Thread Splitter (280 Character Parser)
Automatically break long essays or text into a numbered sequence of clean 280-character tweets for effortless X / Twitter thread publishing.
X / Twitter Header Banner Cropper (1500x500px)
Crop photos to 1500x500px for X (Twitter) profile banners with dynamic bottom-left profile avatar obstruction indicator.
X / Twitter Bio Character Counter (160 Max)
Validate your X (Twitter) profile bio against the strict 160-character limit. Craft compelling summaries without wasting time on submission errors.
X / Twitter Image Alt Text Accessibility Checker
Write and validate image alt-text descriptions for X / Twitter posts within the 1,000-character accessibility limit.
X Premium Long-Form Article Headline & Card Previewer
Preview how X Premium Long-Form Article headlines and thumbnail summary cards display in user timelines before publishing.
X / Twitter Video Aspect Ratio Checker (1:1, 16:9, 9:16)
Validate video presentation files against supported X / Twitter video aspect ratios (1:1 square, 16:9 widescreen, or 9:16 mobile vertical).
Discord Tools (4)
Updated for current 2026 rules and mobile viewportsDiscord Webhook Announcement & Color Embed Builder
Visually build color-coded Discord webhook embeds and announcement cards. Export clean, formatted JSON ready for bot integrations and channel alerts.
Discord Server Banner Cropper (960x540px)
Crop and resize banner graphics to exactly 960x540px for Boosted Discord Server headers with zero image degradation.
Discord Custom Emoji Resizer (128x128 & 256KB Limit)
Resize custom graphics and memes into 128x128px Discord server emojis while ensuring file sizes stay strictly under the 256KB constraint.
Discord Role Name & Unicode Icon Formatter
Format Discord role names with clean decorative Unicode symbols, separators, and icons within Discord's 100-character constraint.
Twitch Tools (4)
Updated for current 2026 rules and mobile viewportsTwitch Emote Multi-Size Exporter (28x28, 56x56, 112x112)
Upload a single artwork file and download all 3 required Twitch emote sizes (28x28, 56x56, 112x112) instantly inside a clean ZIP archive.
Twitch Subscriber Badge Resizer (18x18, 36x36, 72x72)
Generate all three required Twitch subscriber loyalty loyalty badge sizes (18x18, 36x36, 72x72) from a single image in an instant ZIP download.
Twitch Offline Video Player Banner Cropper (1920x1080px)
Crop and scale stream graphics to pristine 1920x1080px Full HD resolution for Twitch offline player screen banners.
Kick Streaming Platform Emote & Badge Multi-Rescale
Batch scale images and artwork to Kick streaming platform emote and subscriber badge specifications with unified ZIP archive download.
Pinterest Tools (3)
Updated for current 2026 rules and mobile viewportsPinterest Pin 2:3 Aspect Ratio Cropper (1000x1500px)
Crop photos to Pinterest's officially recommended 2:3 vertical portrait ratio (1000x1500px) for maximum feed engagement and visual reach.
Pinterest Pin Title Cutoff & Truncation Previewer
Preview where Pinterest pin titles get truncated in discovery feeds (~30 characters). Keep your critical SEO keywords above the cutoff fold.
Pinterest Board Description SEO & Character Counter
Optimize Pinterest Board descriptions for internal search discovery within the 500-character allowance with real-time keyword density tracking.
Threads / Bluesky Tools (4)
Updated for current 2026 rules and mobile viewportsThreads Post Character & UI Display Previewer (500 Limit)
Compose and test updates for Meta Threads within the generous 500-character limit with simulated modern thread UI presentation.
Threads Carousel 1:1 Square & 4:5 Portrait Cropper
Crop and standardize multi-image photo carousels for Meta Threads in clean 1:1 square or 4:5 vertical aspects.
Bluesky 300-Character Thread Splitter & Parser
Automatically divide long narratives and commentary into structured 300-character post sequences for seamless Bluesky social thread broadcasting.
Bluesky Image Alt Text Accessibility Checker (1,000 Limit)
Write and validate image accessibility alternative text for Bluesky posts within the 1,000-character limit.
Facebook Tools (2)
Updated for current 2026 rules and mobile viewportsFacebook Cover Photo Safe Area Inspector (820x312 vs 640x360)
Preview Facebook cover photo cropping between desktop widescreen (820x312px) and smartphone mobile (640x360px) viewports simultaneously.
Facebook Ad Visual Text Coverage 5x5 Grid Checker
Inspect advertising graphics with an interactive 5x5 grid overlay to evaluate text density and clarity for optimal Meta Ad conversion rates.
Reddit Tools (2)
Updated for current 2026 rules and mobile viewportsReddit Post Title Cutoff & 300-Char Limit Previewer
Check Reddit post titles against the 300-character maximum and see exact mobile app feed cutoff boundaries (~120 characters).
Reddit Spoiler Tag & Clean Markdown Generator (>!text!<)
Generate clean Reddit markdown spoiler syntax (>!text!<) instantly without syntax errors or broken rendering across mobile and web platforms.
Facebook / LinkedIn / X Tools (1)
Updated for current 2026 rules and mobile viewportsWhy Creators & Marketers Trust Our Free Social Media Tools
Generic cropping tools and word counters fail when your content gets published. Here is why creators rely on our specialized tools:
Instant 1-Click Access
Zero sign-up, zero downloads, and no paywalls. Open any tool and get instant pixel-perfect results in seconds.
100% Private & Data Safe
Your text, images, and videos are processed entirely inside your web browser. We never save, track, or store your content on any server.
Tailored to 2026 Rules
Calibrated to exact mobile & desktop viewports, line break rules, character limits, and vertical video safe zones for every major network.
No Generic Dropdowns
Purpose-built formatters designed specifically for each network — LinkedIn, TikTok, Instagram, YouTube, X, Discord, Twitch, Pinterest, Threads, and Reddit.