Free AI Caption Generator
Write social media captions with free AI. Choose a platform, tone, and audience, generate three editable options, and copy or download your favorite.
Find the words. Prepare the visuals. Then bring ChatGPT, Claude, Gemini, or your preferred AI assistant to Postly to plan your social media campaign. You review. You approve the schedule.
Use the tools below for free. The 14-day Postly Pro trial requires a card. Assistant connections require API access; setup varies.
46 tools by Postly
Draft the caption, prepare your visual, and preview the post. Turn the result into your next agent-led campaign with Postly.
Find tools for content planning, hashtags, video preparation, campaign links, and publishing.
46 tools
Create and refine captions, bios, scripts, and posts with three editable options.
Write social media captions with free AI. Choose a platform, tone, and audience, generate three editable options, and copy or download your favorite.
Create a social media bio for your business or personal brand. Generate three editable AI bios with a custom character target, tone, and audience.
Generate clear calls to action for social posts and campaigns. Describe the offer and desired action, then compare three editable AI suggestions.
Generate opening lines for social media posts. Get three editable AI hooks tailored to your topic, audience, platform, and tone, without signing up.
Write LinkedIn post drafts from your professional experience. Generate three clear alternatives, edit the opening and structure, and preview before posting.
Rewrite social media copy while preserving its meaning. Get three editable paraphrases in your chosen tone and language, with no signup required.
Generate short social video scripts from your idea. Get three editable drafts with an opening, main message, and closing for Reels, Shorts, or social videos.
Create complete social media post drafts from an idea. Choose your audience, platform, and voice, then edit, preview, copy, or download three AI options.
Expand a short social media idea into a fuller draft. Add clarity and structure using the details you provide, then edit and download three alternatives.
Shorten social media text while keeping its main message. Generate concise alternatives, check their length, and copy or download the edited result.
Create YouTube video descriptions from your notes. Generate clear summaries and calls to action, then add verified links and edit the text before publishing.
Generate YouTube title ideas based on your video. Compare three concise AI titles, edit the wording, and choose an accurate title that matches the content.
Find social media content ideas for your niche and audience. Generate three practical post concepts with suggested formats and angles to develop.
Resize, crop, compress, and convert images locally in your browser.
Resize and crop images into square, portrait, story, and landscape formats. Adjust framing, download PNG or JPEG, or export a ZIP, all in your browser.
Convert JPEG, PNG, and WebP images in your browser. Preview the result, choose a background for JPEG, and download the converted image for free.
Compress images in your browser. Adjust JPEG or WebP quality, reduce dimensions, compare file size, and download without uploading your photos.
Preview posts, check text budgets, tidy drafts, and create QR codes.
Preview social media text and images before publishing. Check line breaks, approximate feed truncation, and character counts in desktop or mobile layouts.
Create a free static QR code for a website link or text. Preview it instantly, choose a download size, and export PNG or SVG without signing up.
Count social media characters, words, and lines. Compare standard post limits, check X weighted length, and copy or download your edited text.
Clean up social media text, change case, trim extra spaces, and format bullet lists. Preview the result and copy or download plain text for free.
Audit website pages, compare competitors, and turn measured findings into improvements.
Review the title, description, and social preview metadata of a public page.
Review robots.txt availability and page-level indexing directives.
Check a public page for technical, content, mobile, accessibility, and sharing issues. Get measured findings and prioritized fixes.
Compare your page with one competitor to review metadata, headings, and observed content themes.
Compare two public channels using visible statistics and up to ten recent uploads each.
Create faster, plan smarter, and publish with more confidence.
Boost visibility, sharpen metadata, and grow organic reach.
Utilities for working with video you have permission to use.
Save a Facebook video or supported Reel as an MP4 file in a ZIP, with optional MP3 audio.
Convert a video file to MP3 audio online. Upload a video up to 50 MB, extract its audio and download the MP3. No software installation required.
Generate YouTube title ideas and video descriptions in one free workspace. Choose a tone, compare AI drafts and edit the metadata before publishing.
Save an Instagram Reel or video post as an MP4 file in a ZIP, with optional MP3 audio.
Save a video from a LinkedIn post as an MP4 file in a ZIP, with optional MP3 audio.
Select videos from a YouTube playlist, or save one video or Short, as MP4 files in a ZIP.
Clean, convert, validate, and generate technical assets instantly.