The blog.
Tips, guides, and updates from the Buncha.tools workshop.
- imagewebpavifjpgjpegformatcomparisonperformance
WebP vs AVIF vs JPG: Which Image Format Should You Use in 2026?
Three formats, three tradeoffs. JPG is universal, WebP is the modern web default, AVIF is the smallest. Here's a practical guide to picking the right one for the job — and what to do when you need to convert from one to another.
May 10, 2026·8 min read - imagewebppngconverthow-to
How to Convert WebP to PNG (Without an Account or Upload)
WebP is everywhere now — saved from any browser's right-click "Save image". The trouble is that lots of older software, image-editing apps, and upload forms still expect PNG or JPG. Here's how to convert WebP to PNG in your browser, with no account.
May 6, 2026·4 min read - svgpngconvertrasterdesignhow-to
SVG to PNG — Render a Vector at Any Size, In Your Browser
SVG is sharp at any zoom, but plenty of places — Instagram, email signatures, slide decks, Etsy thumbnails — only accept raster images. Here's how to convert SVG to PNG at exactly the resolution you need, without an upload.
May 6, 2026·4 min read - imagepngjpgconvertcompressionhow-to
PNG to JPG — When You Should Convert (and When You Shouldn't)
Converting PNG to JPG is usually about file size — JPGs are 5–10× smaller for the same photo. But some PNGs lose quality you can see when converted, and others lose nothing. Here's how to tell which is which, and how to convert without uploading.
May 6, 2026·4 min read - pdfjpgimageconverthow-to
PDF to JPG — Turn Each Page Into an Image (No Upload)
Sometimes you need each page of a PDF as a separate JPG — for social media, for a slideshow, for a workplace that won't open PDFs in chat. Here's how to do it in your browser, what resolution to pick, and when not to bother.
May 6, 2026·4 min read - audiovideomp4mp3extracthow-to
How to Extract Audio from a Video (MP4 to MP3 in Your Browser)
Pulling the audio out of a video — for a podcast clip, a voice memo from a Zoom recording, or a song in a screen capture — used to mean installing ffmpeg or trusting a sketchy ad-laden website. Here's how to do it in your browser without either.
May 6, 2026·4 min read - imagejpgpngconverttransparencyhow-to
When to Convert JPG to PNG (And When You're Wasting Bytes)
Most "JPG to PNG" conversions don't actually help — they make the file 5–10× bigger for no quality benefit. Here's when the conversion is worth it (transparency, layered editing) and when it isn't.
May 6, 2026·4 min read - pdfimagecombineconverthow-to
How to Combine Images into a Single PDF (Without an Account)
Bundling photos, scans, or screenshots into one PDF — for an application form, a portfolio, or a homework submission — used to mean Acrobat or a sketchy free site. Here's how to do it in your browser, including how to control page order and orientation.
May 6, 2026·4 min read - imagecompressionjpgpnghow-to
How to Compress an Image Without Visible Quality Loss
"Compress without losing quality" sounds like marketing nonsense, but there's actual technique. Here's what compression does, why JPG at 85% looks identical to JPG at 100%, and how to halve your file size without anyone noticing.
May 6, 2026·4 min read - kidshealthgrowthpercentile
How to Track Your Kid's Growth at Home (And What the Percentiles Mean)
Pediatricians plot growth charts at every visit. Here's what those P5/P50/P95 lines actually represent, why a single percentile rarely matters, and how to keep your own log between visits.
May 5, 2026·5 min read - financeroommatesexpensehousehold
How to Split Shared Expenses With Roommates (Without Spreadsheets)
The roommate-finance problem — Costco runs, utility bills, the one person who pays for everything — has a simple math solution. Here's how it works and how to track it without a shared bank account or app sign-up.
May 5, 2026·5 min read - imagebackgroundaihow-to
Remove the Background From an Image (Free, In Your Browser)
How background removal works under the hood, why most "free" tools watermark or paywall the result, and how to do it locally in your browser with no upload, no account, and no quality cap.
May 5, 2026·5 min read - mechanicautomotiveobddiagnostics
How to Read OBD-II Codes (P0420, P0171, and What the Letters Mean)
Your check-engine light is on. The shop quoted you $400. Here's how OBD-II codes work, what the most common codes mean, and how to look one up without a $40 scanner subscription.
May 5, 2026·5 min read - securitypasswordgeneratorshow-to
How Long Should Your Password Be in 2026?
The 8-character password is dead. Here's what NIST recommends in 2026, what GPU cracking actually achieves now, and how to think about length vs character variety.
May 5, 2026·4 min read - mileagetaxfinanceinternational
Mileage Tax Deduction — US, UK, Australia, Canada (2025 Rates)
Every country's tax authority has its own per-mile-or-km rate for business driving. Here's the 2025 number for the US (IRS), UK (HMRC), Australia (ATO), and Canada (CRA), plus how the methods differ.
May 5, 2026·5 min read - pdfmergeprivacyhow-to
How to Merge PDFs in Your Browser (No Upload, No Account)
Combining multiple PDFs into one shouldn't require uploading them to a stranger's server. Here's how the browser-only PDF merge works, what file types it handles, and why almost every "free" PDF merger online is built on a privacy compromise.
May 5, 2026·4 min read - developerjsonprivacytools
A JSON Formatter That Doesn't See Your Data
Every API response, error log, and config file passes through a JSON formatter at some point. Most of the popular ones get to read your data. Here's why that's worse than it sounds, and how a browser-only formatter handles the same job without the privacy cost.
May 5, 2026·4 min read - imageheicjpgiphonehow-to
How to Convert HEIC to JPG (iPhone Photos That Actually Open)
iPhone photos save as HEIC by default — efficient, but unreadable on most non-Apple devices. Here's how to convert them to JPG in your browser, why HEIC exists, and how to stop the conversion problem at the source.
May 5, 2026·4 min read - hairsalonstylistprofession
How Salon Stylists Actually Track Color Formulas (And Why Apps Failed Them)
Independent stylists need to remember what they did to your hair last time. The salon-software industry's pitch is a $40-200/month subscription. Most stylists end up using a binder. Here's why, and a third option.
May 5, 2026·4 min read - pdfcompressionprivacyhow-to
How to Compress a PDF Without Uploading It (Browser-Only, Free)
Most "free PDF compressors" upload your file to a server. Here's how to compress a PDF in your browser — no upload, no log, no account — and what compression actually does to a PDF.
May 5, 2026·5 min read - healthbmifitness
BMI Is Flawed — Here's When It's Still Useful
BMI gets a lot of justified criticism. It also remains the most-used screening metric in clinical practice for a reason. Here's what BMI does well, what it doesn't, and how to interpret your number honestly.
May 5, 2026·5 min read - electricalnecelectricianguide
What Wire Size Do I Need? NEC Ampacity + Voltage Drop, Demystified
How to pick the right wire gauge for any branch circuit using NEC Table 310.16 and the voltage drop formula. Whichever constraint is bigger wins.
May 5, 2026·6 min read - electricalnecelectricianvoltage drop
Voltage Drop on Long Runs — When 12 AWG Isn't Enough
How to compute voltage drop, when to worry about it, and a reference table for common circuit lengths. The long-run problem most electricians see in the field.
May 5, 2026·5 min read - healthblood pressurehypertensiontracker
How to Track Blood Pressure at Home — and What the Numbers Actually Mean
The ACC/AHA 2017 categories explained, why a single reading rarely tells you anything, and how to track BP at home in a way your doctor will actually use.
May 5, 2026·6 min read - healththyroidhypothyroidhyperthyroidscreening
"Should I Get My Thyroid Checked? A Symptom-Pattern Self-Check"
How hypo- and hyperthyroid symptoms cluster differently, why thyroid disease is so often missed for years, and what to ask your doctor for.
May 5, 2026·5 min read - householdsubscriptionsbudgetmoney
How to Audit Subscription Creep — and the Number That Will Surprise You
Subscriptions accumulate quietly. Listing them in one place and seeing the annual total is the most useful exercise nobody bothers to do.
May 5, 2026·4 min read - healthsleep apneastop-bangsleepscreening
STOP-BANG — How to Tell If You Should Be Tested for Sleep Apnea
The 8-question validated screening tool used in pre-surgical and primary-care assessment. What each letter means, what the score thresholds mean, and what to do with the answer.
May 5, 2026·5 min read - healthpsaprostatemens healthscreening
PSA Velocity and Doubling Time — Why a Single Number Tells You Nothing
How urologists read PSA trends, what velocity and doubling time mean in plain language, and the math behind the "watch and re-test" decision.
May 5, 2026·5 min read - womens-healthprivacyperiodtracker
A Period Tracker That Stays on Your Phone
Why most period-tracking apps share data with third parties, what to look for in a private alternative, and how to track your cycle without an account.
May 5, 2026·5 min read - womens-healthpregnancyweight gainiomtracker
Pregnancy Weight Gain — What the IOM Bands Actually Mean
How the Institute of Medicine's recommended pregnancy weight-gain ranges are derived from pre-pregnancy BMI, what the numbers mean week by week, and where the bands stop applying.
May 5, 2026·6 min read - womens-healthpmssymptomstracker
Spotting PMS Patterns — Why a Symptom Heatmap Beats a List
Logging symptoms is easy. Seeing the pattern across cycles is the part that matters. Why a calendar-style heatmap surfaces what a list of dates never could.
May 5, 2026·4 min read - healthmental healthdepressionanxietyscreeningphq9gad7
PHQ-9 and GAD-7 — The Two Screens Used in Primary Care Every Day
How depression and anxiety screening actually work in clinical practice, what the scores mean, and why item 9 of the PHQ-9 always matters.
May 5, 2026·6 min read - healthpcosrotterdamwomens healthscreening
"Do I Have PCOS? Walking Through the Rotterdam Criteria"
How PCOS is actually diagnosed, what the three Rotterdam criteria mean in plain language, and what to do with the answer.
May 5, 2026·6 min read - electricalelectricianohms lawfundamentals
Ohm's Law in Practice — The Four Formulas That Run Every Circuit
Volts, amps, ohms, watts — what each one means in the real world, when each formula matters, and the gotcha that bites people computing power on AC.
May 5, 2026·5 min read - electricalnecelectricianconduitguide
Will My Wires Fit? NEC Conduit Fill, Without the Spreadsheet
How NEC Chapter 9 conduit fill works, the 53/31/40 percent rule, and why the right answer depends on how many conductors you're pulling.
May 5, 2026·5 min read - healthmenopausemrswomens healthperimenopause
The Menopause Rating Scale — Tracking Symptoms Beyond "Hot Flashes Bad"
How the MRS works, why the three subscales matter clinically, and what bringing a series of MRS scores to your provider actually changes about the visit.
May 5, 2026·6 min read - householdmeal planningshopping list
A Meal Planner That Spits Out a Shopping List
Why most meal-planning attempts fall apart in week 2, and the small UX choices (drag-free grid, ingredients-per-meal flowing into a deduped shopping list) that fix the friction.
May 5, 2026·4 min read - nursingivdrip ratepharmacologyclinical math
How to Calculate IV Drip Rate (Without the Bedside Panic)
The math behind drops/min ↔ mL/hr ↔ infusion duration, drop-factor by tubing type, and why bartending is the only other job that makes you do this kind of mental math at 3 AM.
May 5, 2026·5 min read - healthipssprostatebphmens healthscreening
"The IPSS — How Urologists Rate BPH Symptoms"
The 7-question Prostate Symptom Score every urologist uses, what each question is asking about, and what the score thresholds actually trigger.
May 5, 2026·5 min read - healthmigraineheadachetracker
How to Actually Find Your Migraine Triggers
Why a list of episodes is useless and a calendar heatmap surfaces the pattern. The clinical fields a headache specialist will ask you about, and how to log them so the answer becomes obvious.
May 5, 2026·5 min read - nursingegfrkidneydrug dosingcockcroft gaultckd-epi
eGFR vs Cockcroft-Gault — Which to Use for Drug Dosing
CKD-EPI 2021 (race-free), MDRD, Cockcroft-Gault — three formulas for kidney function. They give different numbers and serve different purposes. Here's the picking logic.
May 5, 2026·6 min read - pregnancylaborcontractions5-1-1third trimester
When to Go to the Hospital — The 5-1-1 Rule and Why It's Not Always Right
How to time contractions, what 5-1-1 actually means, who it applies to, and the categories of patient who shouldn't follow it.
May 5, 2026·5 min read - nursingbsabody surface areadosingpharmacology
BSA — Mosteller vs DuBois vs Haycock vs Boyd, and Which to Use When
Body surface area is in every chemo dose, every cardiac index, and a lot of pediatric drug calcs. Four formulas all give slightly different answers. Here's the picking logic.
May 5, 2026·5 min read - electricalnecelectricianbranch circuitguide
Sizing a Branch Circuit — Continuous Loads, Breakers, and the 1.25× Rule
Why the NEC 210.20 1.25 multiplier exists, which loads count as continuous, and how to walk from a list of appliances to the right breaker and wire.
May 5, 2026·6 min read - womens-healthbbtfertilityfamtracker
BBT Charting Basics — How the Thermal Shift Confirms Ovulation
How basal body temperature reveals ovulation, what the post-ovulation thermal shift looks like, and the limits of using BBT for fertility planning.
May 5, 2026·5 min read - healthvaccinesimmunizationcdcacip
The Adult Vaccine Schedule, Without Reading the CDC PDF
What's actually due as an adult — flu, COVID, Tdap, MMR, varicella, HPV, hepatitis B, Shingrix, pneumococcal, RSV. Age- and history-based.
May 5, 2026·5 min read - ocrimagesfree toolsguide
How to Extract Text from Images for Free (OCR Online)
Extract text from screenshots, photos, and documents using free OCR. No uploads to servers, works in your browser. Supports printed and handwritten text.
Apr 25, 2026·3 min read - pdfguidefree tools
How to Merge PDF Files Online for Free (No Upload Required)
Learn how to combine multiple PDF files into one document for free. No uploads, no sign-up, no software to install. Works in your browser.
Apr 25, 2026·3 min read - toolsfreeproductivity
100 Free Online Tools You Didn't Know You Needed
Discover 100 free online tools for developers, designers, writers, students, and everyone. From AI-powered writing to image compression — all in one place.
Apr 25, 2026·6 min read - aistudentsstudyeducation
AI Tools for Students: Study Smarter, Not Harder (2026)
Free AI-powered study tools for students — flashcard generation, text simplification, citation formatting, grammar checking, and more.
Apr 25, 2026·5 min read - imagescompressionguide
How to Compress Images Without Losing Quality (2026 Guide)
Learn how to reduce image file sizes by up to 80% without visible quality loss. Free online methods, best settings, and when to use each format.
Apr 25, 2026·4 min read