The best free tools, honestly compared.
We tested every popular online tool so you do not have to. Side-by-side scores, real verdicts, no affiliate kickbacks.
Best free date calculators in 2026
Five free date duration calculators compared for days between dates, add/subtract, and breakdowns.
Best free discount calculators in 2026
Five free discount calculators compared for percent off, sale price, stacked discounts, and tax.
Best free barcode generators in 2026
Five free barcode generators compared for formats, PNG and SVG export, watermarks, and privacy.
Best free aspect ratio calculators in 2026
Five free aspect ratio calculators compared for 16:9, 4:3, 21:9, pixel math, and presets.
Best free password generators in 2026
Six free password generators compared for strength, options, and whether they generate locally.
iLovePDF alternatives that keep your files private
iLovePDF uploads your PDFs. Here are the best alternatives, including ones that never do.
Best free JSON formatters and validators in 2026
Six free JSON formatters compared. Which one formats, validates, and keeps your data private.
Best free concrete calculators for DIY projects (2026)
Five concrete calculators tested on slabs, footings, and round columns. Only two get bag counts right.
Best free mortgage calculators in 2026 (Bankrate, NerdWallet, Zillow, ToolHub)
We ran a $400K mortgage through five popular calculators. Two left out taxes and insurance.
Best free BMI calculators compared (CDC, NIH, NHS, and more)
We checked six BMI calculators against the WHO formula. Some round differently and one is wrong.
Best free unit converters compared (2026)
Google's calculator, OnlineConversion, ConvertWorld, RapidTables, and ToolHub head-to-head.
Best Markdown to HTML converters compared (2026)
We tested six free Markdown converters. Here is which one to use, and why.
Best JWT decoders compared (privacy-safe vs upload-and-pray)
Most online JWT decoders upload your token to a server. We tested the alternatives.
Best free QR code generators (no watermark, no expiry)
Most free QR generators add tracking or expire your codes. These six do not.
Best free image compressors compared (2026)
We compressed the same images with 6 different tools. Here is what we found.
SmallPDF alternatives: 5 free PDF toolkits compared
SmallPDF is paywalled after a few uses per day. Here are five honest alternatives.
TinyPNG alternatives that respect your privacy
Six free image compressors compared. Most upload your files; only one does not.
Best free PDF mergers in 2026 (no signup, no upload)
We tested the top 6 free PDF mergers. Here is which one to use, and why.