12 Free Tools Every Facebook Ads Operator Should Bookmark (2026)
12 single-purpose tools I built (and use myself) to handle the boring parts of media buying: creative anonymization, audience hashing, pixel checks, LP audits, ad copy spinning. All run in your browser. No signup, no API keys, nothing uploaded anywhere.
If you run Facebook ads at any volume you spend most of your day moving files between formats, hashing CSV lists, copying tracking URLs from one place to another, and checking why your pixel suddenly isn't firing. None of this work is hard; it's just annoying friction. So I built a set of free tools that handle each piece in one click.
All of them live at adcow.online/tools/ and require nothing from you — no email, no signup, no API connection. Most are 100% browser-side (your files literally never leave your device). A few use a small PHP backend on our server for things like DNS lookups and URL fetching, but again — nothing stored.
Below is the full list, grouped by what you'd reach for them. Bookmark the ones useful to you.
🎨 Creative & Video
🖼️ Carousel Splitter
Slice one image into perfectly-sized carousel slides for Facebook & Instagram
Upload a wide image, get 2-10 square slides with correct dimensions for Meta carousels. Handles bleed, snap-to-grid, and adds visual guide lines so slides flow naturally when swiped.
✍️ Ad Copy Spinner
Generate dozens of ad copy variants from a single template
Write a template like "Try our {amazing|incredible|game-changing} {tool|app|platform}" and get every combination instantly. Filter by Meta character limits (40/125/2200), export to CSV, or copy directly into Ads Manager.
🎨 Bulk Image Variants
Turn one image into 20 unique variants for cross-account testing
Upload a single image, get 5-50 variants with controlled randomization: crop offsets, hue shifts, slight color grading, optional text overlays, micro-noise. Every output has a unique hash but stays visually consistent.
💬 Subtitle Burner
Auto-generate and burn subtitles into video — 85% of viewers watch with sound off
Upload video, get a transcript via Whisper AI, edit if needed, burn subtitles directly into the video file. Style controls for font, size, position, background. Outputs hardcoded MP4 that works everywhere.
🎬 Creo Recoder
Re-encode videos and images so each file gets a unique hash
Bypass Meta's duplicate-creative detection by re-encoding video and image files. Strips EXIF, applies light color shift, changes bitrate. 100% client-side — files never leave your device.
👥 Audiences & Data
🔐 Email & Phone Hasher
SHA-256 hash CSV files for Meta Custom Audiences and Google Customer Match
Upload a CSV with emails and phones. Get back a properly hashed file (SHA-256, lowercase, trimmed, E.164 phone format) ready to upload as Custom Audience on Meta, Google, TikTok, or LinkedIn.
🔗 Tracking & Pixels
🔗 Tracking Link Builder
Build Meta-compatible tracking URLs with proper macro substitution
Generate tracking URLs for Facebook Ads with UTM parameters, Meta dynamic macros ({{ad.id}}, {{adset.id}}, {{campaign.id}}, {{placement}}, {{site_source_name}}), and preview the final URL with example values substituted.
📊 Pixel & CAPI Diagnostics
Find and fix the tracking issues silently costing you 20-40% of conversions
Enter your Pixel ID. Tool checks event match quality, deduplication between browser pixel and CAPI, missing events, broken parameters, and ATT-impacted iOS attribution. Get specific code fixes for each issue.
→ Open Pixel & CAPI Diagnostics
🌐 Landing Pages
⚡ WebP / AVIF Converter
Cut landing page image weight by 60-80% with one drag-and-drop
Drag any JPG or PNG, get WebP or AVIF versions with quality slider. Compare before/after side-by-side. Bulk-convert entire image folders. All client-side, no upload limits.
🛡️ Landing Page Compliance Check
Scan any landing page for issues that cause Meta ad disapprovals
Enter your LP URL. Bot crawls it like Meta's scanner: checks load speed, cookie consent flow, popup aggressiveness, hidden CTAs, missing privacy policy, fake testimonials, broken tracking. Returns risk score with specific fix recommendations.
→ Open Landing Page Compliance Check
🌐 Domain Health Checker
Check domain age, history, and blacklist status before buying or launching
Enter a domain. Get full report: WHOIS age, ownership history, presence in Spamhaus / SURBL / Meta blocklists, prior Facebook ad ban history, current PageRank, SSL status, and reputation score.
🧮 Planning & Math
🧮 Budget & Frequency Calculator
Predict reach, frequency, and audience saturation before you launch
Input audience size, daily budget, and average CPM. Get predicted daily reach, weekly frequency, and time-to-saturation for that audience. Avoid the "why is my CPA climbing on day 5" surprise.
→ Open Budget & Frequency Calculator
❤️ Account Health Score
Predict your Meta account ban risk before it happens
Connect your Business Manager via Meta OAuth (read-only). Get a 0-100 health score based on: spend-to-verification ratio, BM age, prior policy violations, ad rejection rate, payment method stability, frequency outliers, audience overlap, manual review history.
👁️ Competitor Research
👁️ Ad Library Downloader
Bulk-download competitor creatives from Meta Ad Library
Paste a Meta Ad Library URL (page or search). Get all videos and static images downloaded as zip, organized by ad ID. Includes metadata: copy text, launch date, target audience, placements.
Why these exist
Most of the painful repetitive tasks in media buying have no good free tools. The ones that exist are either: 1) hidden behind a $99/mo SaaS, 2) part of some bloated all-in-one platform that wants your email and OAuth token, or 3) browser extensions that read all your traffic.
I built these one weekend each, mostly because I needed them myself across the accounts I manage. Putting them up free is partly portfolio for AdCow, partly genuine help. If they save you 30 minutes a day, great. If you also need agency-grade ad accounts to actually run campaigns through, we sell those too.
Coming next
The roadmap has a few more tools coming: Account Health Score (Meta OAuth-based predictive ban warning), and a couple of single-purpose calculators. If there's a specific friction in your workflow that you want automated — tell me, I'll build it.
Bookmark
👉 adcow.online/tools/ — full list with descriptions in 4 languages (EN, UK, RU, 中文). All free, all browser-based, all no-signup.