Free tools

Free tools for founder-led content.

A growing library of free generators, calculators, and helpers for every platform: hooks, captions, engagement math, formatting, and repurposing. Each one covers a small piece of what the CaptureFlow agent does end to end, and a new tool goes live every week.

Showing 99 of 99 tools

You vs benchmark
You6.2%
Industry avg3.1%

Engagement Rate Benchmarks

Free
Calculators

What counts as a good engagement rate, by platform and audience size.

Open tool

Employee Advocacy ROI Calculator

Free
Calculators

Reach and earned media value of an employee advocacy programme.

Open tool
captureflow.ai

Link Preview Tester

Free
Utilities

See how your link renders on LinkedIn, X, and Slack before sharing.

Open tool

Social Media Image Resizer

Free
Design

Resize one image to every platform size, without uploading it.

Open tool
Follower growth+12%
6-month projection

Follower Growth Calculator

Free
Calculators

Your compound monthly growth rate, benchmarked and projected.

Open tool
Grade 6
Easy
Short sentences · no jargon

Readability Checker

Free
Optimize

Get a Flesch score and see which sentences lose readers.

Open tool
Suggested rateper post
$450/ post

Instagram Sponsorship Calculator

Free
Calculators

What to charge per sponsored post, based on reach and engagement.

Open tool
62/ 100
Needs work
Not searchable · Too generic · No outcome

LinkedIn Headline Analyzer

Free · AI
Profile

Score your profile headline for clarity, searchability, and positioning.

Open tool
12:40
3 moments found

Video to Post

Free · AI
Repurposing

Paste a YouTube link and pull the posts hiding in the video.

Open tool
SRT
Captions, auto-timed

SRT Caption Generator

Free
Utilities

Download a ready-to-use .srt subtitle file for any video.

Open tool
…see more

LinkedIn Post Preview

Free
Utilities

See exactly where LinkedIn truncates your post on mobile and desktop.

Open tool
1 video =+8 clips
12posts

Content Repurposing Calculator

Free
Calculators

See how many posts, clips, and carousels are hiding in your recording.

Open tool
Creator earningsest.
$780/ month

TikTok Money Calculator

Free
Calculators

Estimate TikTok earnings from Creator Rewards and brand deals.

Open tool
78/ 100
Solid
Hook82
Structure70
Value88
CTA60

LinkedIn Post Scorer

Free · AI
Optimize

Score a draft across hook, structure, value, and CTA before you post.

Open tool
Transcript ready

YouTube Transcript Generator

Free
Repurposing

Paste a YouTube link and get the full transcript, plain or timestamped.

Open tool
𝗕𝗼𝗹𝗱 𝗵𝗲𝗮𝗱𝗲𝗿
𝘐𝘵𝘢𝘭𝘪𝘤 𝘴𝘵𝘺𝘭𝘦
𝕆𝕦𝕥𝕝𝕚𝕟𝕖 𝕥𝕖𝕩𝕥

LinkedIn Text Formatter

Free
Utilities

Bold, italic, and 10 Unicode styles that survive the feed.

Open tool
Curiosity
How-to
List
10 titles ranked

YouTube Title Generator

Free · AI
Hooks

Generate 10 clickable, searchable titles for any video.

Open tool
214/ 280
fits X

Social Media Character Counter

Free
Utilities

Live character counts against every platform's real limits.

Open tool
HeadlineAI
KeywordOutcomeRole

LinkedIn Headline Generator

Free · AI
Profile

Write a headline that gets you found in searches and clicked in feeds.

Open tool
Article
Reshaped for

Blog to Social Posts

Free · AI
Repurposing

Turn one article into a week of platform-native posts.

Open tool
LinkedIn postAI
StoryListInsight

LinkedIn Post Generator

Free · AI
Writing

Draft a complete LinkedIn post from a topic in Story, List, or Insight format.

Open tool
CaptionAI
FunProBold

Instagram Caption Generator

Free · AI
Writing

Write captions that fit your photo, tone, and audience in seconds.

Open tool
Engagement rateTop 10%
6.2%engagement

Engagement Rate Calculator

Free
Calculators

Calculate your engagement rate on any platform and see how you benchmark.

Open tool
Original post
Reshaped for

Post Repurposer

Free · AI
Repurposing

Reshape one post into X, Instagram, and LinkedIn versions.

Open tool
Hashtag setsby reach
Broad
#marketing#growth
Niche
#b2bsaas#foundersjourney
Branded
#buildinpublic

AI Hashtag Generator

Free · AI
Hashtags

Relevant hashtags for any post, organized by reach tier.

Open tool
Contrarian
Story
Stat
8 hooks generated

LinkedIn Hook Generator

Free · AI
Hooks

Turn any topic into 10 scroll-stopping opening lines, one per proven style.

Open tool
Make it 𝗯𝗼𝗹𝗱 and it 𝘀𝘁𝗶𝗰𝗸𝘀.
Copysurvives the feed

Bold Text Generator

Free
Utilities

Copy-paste bold and styled text for any social platform.

Open tool
𝓢𝓬𝓻𝓲𝓹𝓽 𝓼𝓽𝔂𝓵𝓮
Ⓑⓤⓑⓑⓛⓔ ⓣⓔⓧⓣ
𝙼𝚘𝚗𝚘 𝚏𝚘𝚗𝚝

Social Media Font Generator

Free
Utilities

Convert text into stylish Unicode fonts for bios and posts.

Open tool
CaptionAI
IGXLinkedIn

AI Caption Generator

Free · AI
Writing

One caption, tuned for every platform you post on.

Open tool
PostAI
SharpThreadReply

X Post Generator

Free · AI
Writing

Turn an idea into a sharp post that fits X's pace.

Open tool
BioAI
WittyClearSEO

Instagram Bio Generator

Free · AI
Profile

Five bio options under 150 characters that say who you are and why to follow.

Open tool
CaptionAI
PunchyTrendPOV

TikTok Caption Generator

Free · AI
Writing

Short, punchy captions that match TikTok's rhythm.

Open tool
DescriptionAI
SEOChaptersLinks

YouTube Description Generator

Free · AI
Writing

SEO-friendly descriptions with chapters and links, from your video topic.

Open tool
Your niche 10 ideas
The mistake that cost me 6 months
3 tools I can't work without
What nobody tells new founders

Content Idea Generator

Free · AI
Ideation

Never stare at a blank page, get 10 ideas from your niche.

Open tool
Transcript
Reshaped for

Transcript to Posts

Free · AI
Repurposing

Paste any transcript and extract the 10 posts hiding in it.

Open tool
Tweet
Expanded to

X Post to LinkedIn Post

Free · AI
Repurposing

Expand a tweet into a LinkedIn post that fits the platform.

Open tool
1
2
3
8-post thread from one idea

X Thread Builder

Free · AI
Formats

Expand one idea into a structured, numbered thread.

Open tool
Hashtag setsby reach
Reach
#reels#explore
Niche
#smallbiztips#creatorlife
Branded
#madewithlove

Instagram Hashtag Generator

Free · AI
Hashtags

Hashtag sets sized for your account, not just the biggest tags.

Open tool
Bold
POV
Question
first 3 seconds

TikTok Hook Generator

Free · AI
Hooks

First-3-seconds hooks that stop the scroll on TikTok.

Open tool
01
02
03

Carousel Outliner

Free · AI
Formats

Get a slide-by-slide outline for a LinkedIn or Instagram carousel.

Open tool
Converts visitors

LinkedIn Bio Generator

Free · AI
Profile

Write a LinkedIn About section that sounds like you and converts profile visitors.

Open tool
IG engagementAbove avg
4.8%engagement

Instagram Engagement Calculator

Free
Calculators

Your Instagram engagement rate, benchmarked by follower tier.

Open tool
TikTok engagementStrong
9.1%engagement

TikTok Engagement Calculator

Free
Calculators

Measure TikTok engagement the way brands actually evaluate it.

Open tool
Est. earningsRPM $4
$2.1k/ month

YouTube Money Calculator

Free
Calculators

Estimate channel earnings from views, niche, and RPM.

Open tool
Scriptunder 60s
0:03Hook
0:20Story
0:40CTA

Video Script Generator

Free · AI
Formats

A tight script with hook, beats, and CTA for any topic.

Open tool

Quote Extractor

Free · AI
Repurposing

Pull the most quotable lines from any text or transcript.

Open tool
line break kept
line break kept
line break kept

LinkedIn Line Break Generator

Free
Utilities

Add clean line breaks and spacing that platforms won't strip.

Open tool
Trackable link
site.com/?utm_source=li&utm_medium=social&utm_campaign=launch

UTM Link Generator

Free
Utilities

Build trackable campaign URLs without breaking them.

Open tool
Best time to post
Tue 9am peaks

Best Time to Post Calculator

Free
Planning

Data-backed posting windows for your platform, audience, and timezone.

Open tool
This month12 posts

Content Calendar Generator

Free · AI
Planning

A month of mapped content slots from your pillars and cadence.

Open tool
1:1
4:5
16:9

Social Media Image Size Guide

Free
Design

Every platform's current image dimensions, searchable and up to date.

Open tool
On-screen
Voiceover
Question
Reels hooks

Reels Hook Generator

Free · AI
Hooks

Opening lines and on-screen text hooks for Instagram Reels.

Open tool
Your channel10 ideas
I tried X for 30 days
The truth about Y
5 mistakes beginners make

YouTube Video Ideas Generator

Free · AI
Ideation

Ten video ideas from your channel's niche, ranked by search demand.

Open tool
PostAI
WarmStoryCTA

Facebook Post Generator

Free · AI
Writing

Posts written for Facebook's longer, conversational feed.

Open tool
PostAI
CasualReply-bait

Threads Post Generator

Free · AI
Writing

Casual, conversation-starting posts written for Threads.

Open tool
Before
After · stronger hook

Post Booster

Free · AI
Writing

Paste an existing post, get a rewrite with a stronger hook and better rhythm.

Open tool
PinAI
KeywordHookCTA

Pinterest Pin Description Generator

Soon
Writing

Keyword-rich pin titles and descriptions that get discovered.

In progress
72%
10

AI Infographic Generator

Soon
Design

Turn a list or framework into a branded, shareable infographic.

In progress
Sustainable cadenceLinkedIn
/ week

Posting Frequency Calculator

Soon
Calculators

How often to post per platform, with a schedule you can sustain.

In progress
High
Ready
Strong hook · shareable · clear CTA

Viral Score Checker

Soon
Optimize

A pre-publish checklist that predicts engagement and surfaces fixes.

In progress
A
base
B
+38%

Post A/B Preview

Soon
Optimize

Compare two versions of a post side by side before publishing.

In progress
Positive
Warm
Confident, upbeat tone

Post Sentiment Analyzer

Soon
Optimize

Check the emotional tone of a draft before your audience does.

In progress
Ad estimate
$500budget
48k
Impr.
1.2k
Clicks
96
Leads

Social Ad Budget Calculator

Soon
Calculators

Estimate impressions, clicks, and leads from any ad budget.

In progress
Photo score3/4
Face fills frame
Good lighting
Neutral background
Genuine smile

Profile Photo Checker

Soon
Profile

Audit your profile photo against what converts visitors.

In progress
@founderjane
@janebuilds
@jane.co

Username Generator

Soon
Profile

Available username ideas for any platform, checked live.

In progress
@founderjane
@janebuilds
@jane.co

Instagram Name Generator

Soon
Profile

Creative handle ideas with instant availability checks.

In progress
@founderjane
@janebuilds
@jane.co

TikTok Username Generator

Soon
Profile

Username ideas that fit your niche, checked for availability.

In progress
@founderjane
@janebuilds
@jane.co

YouTube Channel Name Generator

Soon
Profile

Channel name ideas that are memorable and searchable.

In progress
@founderjane
@janebuilds
@jane.co

Username Availability Checker

Soon
Utilities

Check one handle across every major platform at once.

In progress
Branded QR

QR Code Generator

Soon
Utilities

Branded QR codes for profiles, links, and events.

In progress

Instagram Grid Splitter

Soon
Design

Slice one image into a seamless multi-post grid.

In progress
safe zone

Video Safe Zone Checker

Soon
Design

See what TikTok, Reels, and Shorts crop before you export.

In progress
Episode
Reshaped for

Podcast to Posts

Soon
Repurposing

Turn an episode into quotes, clips notes, and text posts.

In progress
Post drafted

Voice Note to Post

Soon
Repurposing

Talk for a minute, get a polished post in your phrasing.

In progress
Notes
Reshaped for

Meeting Notes to Post

Soon
Repurposing

Turn meeting takeaways into shareable insights, ethically.

In progress
Scriptunder 60s
0:02Hook
0:15Build
0:45Payoff

YouTube Shorts Script Generator

Soon
Formats

Sub-60-second scripts built for retention.

In progress
Scriptunder 60s
0:02Hook
0:12Value
0:28CTA

Reel Script Generator

Soon
Formats

Hook, beats, and on-screen text for Instagram Reels.

In progress
Scriptunder 60s
0:02Hook
0:10Turn
0:25CTA

TikTok Script Generator

Soon
Formats

Scripts with pattern interrupts where TikTok needs them.

In progress
Clip-worthy moments
0:003 moments12:40

Key Moments Finder

Soon
Repurposing

Find the clip-worthy moments in a long recording.

In progress
Webinar
Reshaped for

Webinar to Posts

Soon
Repurposing

Turn a webinar into a launch-week content set.

In progress
Case study
Reshaped for

Case Study to Posts

Soon
Repurposing

Turn customer wins into proof-driven social posts.

In progress
What would you add? Wrong answers only.
48 reactions · 12 replies

CTA Writer

Soon
Writing

Generate calls-to-action that actually get replies.

In progress
Great post! How did you start?
Love this, here's the exact first step I took…
AI draft in your voice

AI Comment Generator

Soon
Writing

Thoughtful comment drafts that start conversations, not spam.

In progress
Hi Sam, your post on pricing hit home. Building in the same space, would love to connect.
AI draft in your voice

Connection Message Generator

Soon
Writing

Personalized LinkedIn connection requests that get accepted.

In progress
Saw you just launched, congrats. Quick question on your onboarding flow…
AI draft in your voice

DM Opener Generator

Soon
Writing

First messages that read like a human, not a funnel.

In progress
This didn't work for me.
Totally fair, here's what I'd tweak for your case…
AI draft in your voice

Comment Reply Generator

Soon
Writing

Reply to every comment in your voice, fast.

In progress
Which one are you?
Yes, always62%
Sometimes28%
Never10%

Poll Question Generator

Soon
Ideation

Poll questions people actually want to vote on.

In progress
30-day challengeDay 12

30-Day Content Challenge

Soon
Planning

A personalized 30-day posting challenge with daily prompts.

In progress
Text50%
Video30%
Carousel20%

Content Mix Analyzer

Soon
Planning

See your format mix vs what top creators actually post.

In progress
Your 4 pillars
Build
Teach
Story
Proof

Content Pillar Generator

Soon
Planning

Define 3 to 5 pillars that cover your niche without repeating yourself.

In progress

Quote Card Maker

Soon
Design

Turn a line into a branded, shareable quote image.

In progress

LinkedIn Banner Maker

Soon
Design

Design a 1584x396 profile banner from clean templates.

In progress

YouTube Thumbnail Idea Generator

Soon
Design

Thumbnail concepts with layout, text, and emotion cues.

In progress
Your sweet spotmatched
AI for solo founders
No-code growth
Bootstrapped SaaS

Niche Finder

Soon
Ideation

Find the content lane where your depth meets demand.

In progress
Your brand voice
BoldWarmWittyDirectPlayful
Bold, warm & direct

Brand Voice Quiz

Soon
Ideation

Answer 10 questions, get a one-page voice guide to reuse everywhere.

In progress
SaaS founders100+
Behind our pricing change
A churn story worth telling
What our data actually shows

Post Ideas by Industry

Soon
Ideation

100+ post prompts organized by industry and format.

In progress
This weekprompts
A moment you almost quit
A client who changed your mind
Your worst launch, honestly

Storytelling Prompt Generator

Soon
Ideation

Prompts that pull real stories out of your work week.

In progress
Story
Stat
Contrarian
200 proven hooks

Hook Swipe File

Soon
Hooks

200 proven hooks, searchable by style and topic.

In progress
Want a tool we don't have yet?
Tell us what would help and we'll build it.

Free tools, frequently asked.

Are these tools really free?

Yes. Every live tool on this page is free to use, with no credit card and no CaptureFlow account. They are small, focused helpers for founder-led content.

What is the LinkedIn Profile Analyzer?

It is an AI-powered audit of your LinkedIn profile. You get an overall score, a section-by-section breakdown, and quick wins you can fix in under 5 minutes.

How do the free tools relate to CaptureFlow?

Each tool covers one small step of the content workflow. CaptureFlow is an AI content agent that turns your expertise into weeks of on-brand content for every platform, so it runs the whole workflow end to end.

When are the other tools launching?

A new tool goes live every week, working down the list roughly in the order shown. Everything not yet live is marked coming soon, and suggesting a tool moves it up the queue.

100+ founders capturing this week

Free tools are just the start.

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