Run a Small Group Call With Host Approval (Only Let the Right People In)
A practical look at running a small video call where the host admits each person from a waiting room, and when that control is worth the extra step.
Insights
Blog
Tutorials, explainers, and product updates that help people get more value from the Haivix tool library.
Sharing Your Screen in a Small Meeting — Without Losing Sight of Everyone
Share your screen in a browser meeting and keep the group visible with a spotlight layout and a participant filmstrip — no install, no account.
How to Start a Free Video Meeting in Your Browser (No Account, Up to 5 People)
Start a free browser video meeting for up to 5 people in about two minutes — no account, no install — and invite guests with a single link.
How to Record Audio in Your Browser (Microphone, No Install)
Record your microphone in the browser, watch a live level meter, pause and resume, then download the audio. No install and nothing is uploaded.
How to Test Your Webcam Before a Meeting (No Install)
Check your webcam before a call: live preview, resolution and frame rate, mirror, and a snapshot. Fix a black or blocked camera. Nothing is uploaded.
How to Pick a Color From Your Screen and Convert HEX/RGB/HSL
Pick a color from anywhere on your screen with the browser EyeDropper, or from an image, and copy HEX, RGB, and HSL values. Free and browser-local.
Share Your Screen With Friends Online (No Install) — and Fix the Sound
Start a private room, share one link, and fix why viewers cannot hear the video.
How to Record Your Screen With Webcam and Microphone (Browser-Only)
Record your screen, window, or tab with a webcam overlay and microphone, pause and resume, then download the video. No install, nothing uploaded.
Screen Sharing Not Working? A 5-Minute Browser and Network Check
Run a quick readiness check for screen-share permissions, microphone, camera, codecs, and network, then fix the exact failure before your call.
How to Encode and Decode Base64 Without Corrupting Data
Encode UTF-8 text or files to Base64, decode back to text, and know when Base64 is the wrong tool.
Avalanche vs Snowball: Pick a Debt Payoff Plan You Can Finish
Compare avalanche, snowball, and minimum-only payoff plans across multiple debts, then download a month-by-month CSV estimate.
How to Remove an Image Background Locally
Remove any image background with an on-device AI model, or fall back to a color key for flat studio shots. Export a transparent PNG without uploading the photo.
How to Read Email Headers for Delivery and Auth Clues
Paste raw email headers to trace delivery hops, delays, and SPF/DKIM/DMARC tokens locally—for triage, not forensic proof.
How to Turn a Title Into a Clean URL Slug
Turn a headline into a lowercase, accent-stripped, hyphenated permalink slug in the browser—ready for SEO-friendly URLs.
How to Build and Send API Requests Without Leaving the Browser
Build HTTP method, URL, headers, and body in the browser, inspect status and timing, then copy cURL or fetch when CORS blocks the call.
How Compound Interest Grows Savings (and What the Model Leaves Out)
Project compound growth with contributions, compare 6%, 8%, and 10% scenarios, and treat the result as an estimate—not a forecast.
How to Read and Set Linux chmod Permissions
Build owner, group, and others modes as octal and symbolic rwx, then copy a chmod command—without setuid or ACL complexity.
How to Resize Images to Exact Dimensions
Resize one or many images by percent or exact pixels, keep aspect ratio when you need it, then download files or a ZIP—locally in the browser.
How to Write a robots.txt File Without Blocking Your Site
Draft Allow and Disallow rules plus sitemap URLs for one user-agent, validate path mistakes, then copy robots.txt for your host.
How to Look Up DNS Records (A, MX, TXT, and More)
Look up A, MX, TXT, and more over DNS-over-HTTPS, then read status, TTL, and answers for mail and web checks.
How to Convert JSON to CSV Without Breaking Columns
Convert a JSON array to CSV or TSV in the browser, flatten nested fields, and protect formula-like cells before download.
How to Decode and Inspect a JWT Before You Trust It
Decode a JWT, inspect claims and expiry, and verify HS256/384/512 locally without sending secrets to a server.
How Marketplace Fees Change Your Net Profit
Estimate marketplace and payment fees, product costs, and net profit with editable presets—then confirm live seller rates.
How to Preview Open Graph Images Before You Share
Preview an Open Graph share card, check title and image layout, and copy og meta tags before you publish.
How to Generate a Strong Password You Can Actually Use
Generate a random password with crypto.getRandomValues, choose length and character sets, then copy it into a manager.
How to Add or Extract GST and VAT From a Price
Add or extract GST/VAT from a price with a rate you enter, then read net, tax, and gross. Arithmetic only.
How to Calculate IPv4 Subnets and Usable Hosts
Calculate IPv4 network, mask, broadcast, host range, and usable addresses from CIDR. IPv4 only—no VLSM planner.
How to Format and Validate JSON Without Breaking It
Format, minify, and validate JSON in the browser, then copy or download data.json without uploading the payload.
JSON-LD Schema Markup for Articles and Products
Generate Article, Product, or business JSON-LD, copy the script tag, and validate it before you publish.
How to Write an ATS-Friendly Resume (and When to Use a CV)
Learn resume vs CV, how applicant tracking systems read documents, which layouts travel safest through ATS uploads, and a checklist before you export a PDF.
Test Campaign Links Before You Launch: UTM and Redirect Checks
Check campaign URLs for redirect chains, lost UTMs, and landing-page warnings before launch—then copy a plain-text report.
How to Write Meta Titles and Descriptions That Match the Page
Write meta titles and descriptions, preview search and social cards, and copy a clean HTML head snippet without keyword stuffing.
Profit Margin vs Markup: Price Products Without Guessing
Compare profit margin vs markup, model fees and fixed costs, and check break-even units before you lock a selling price.
How to Write Cron Expressions You Can Actually Trust
Build a five-field cron expression, preview next run times in your timezone, and avoid day-of-month and weekday mistakes.
How to Create a QR Code That Scans Cleanly
Create a static QR for a final HTTPS URL, set size and contrast for print, download a PNG, and scan-test before production.
How to Create a Professional Invoice: A Practical Guide
Learn how to create a professional invoice with the right business details, itemized charges, tax, payment terms, and a final review checklist.
Everyday Calculators: How to Check the Numbers That Matter
Use percentage, loan, age, BMI, and tip calculators correctly—and understand what each result can and cannot tell you.
Free PDF Tools: A Practical Privacy-First Guide
Learn how to merge, split, organize, compress, and convert PDFs with the right workflow and realistic privacy expectations.
How to Compress Images Without Losing Visible Quality
Learn how to reduce JPG, PNG, and WebP file sizes while preserving the detail people actually notice.
Essential Text Tools for Writers and SEO Workflows
Use word counts, case conversion, comparison, and cleanup tools to make writing and SEO reviews faster without exposing draft text.
How We Build Fast Browser Tools That Scale
A practical look at the architecture choices behind fast, dependable, privacy-first browser utilities.
Introducing Haivix: Private Tools for Faster Everyday Work
Meet Haivix, a growing collection of fast, privacy-first browser tools for PDF, image, text, marketing, and developer workflows.