dev⏱️ 5 min read
URL Encoding Explained: Why %20, +, and %2520 Aren't the Same Thing
#url encoder#percent encoding#encodeuricomponent
August 3, 2026Read more →
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Developer
11 posts in this category.
dev⏱️ 6 min read
Base64 Encoding Explained: Why Your File Just Got 33% Bigger
Base64 turns binary data into plain text so it can survive email, JSON, and URLs — but it isn't encryption and it isn't compression, and it always costs you about 33% in size. Here's what Base64 actually does, why the size increase is mathematically fixed, and when you should (and shouldn't) use it.
#base64#encoding#data url
July 29, 2026Read more →
dev⏱️ 6 min read
UUID v1 vs v4: Which One Should You Actually Use?
UUID v1 and v4 solve the same problem — a unique ID — in completely different ways, and picking the wrong one leaks information or hurts database performance. Here's what's actually inside a UUID, why v1 embeds your MAC address, why v4 can slow down a database index, and how to pick correctly.
#uuid#uuid generator#unique id
July 28, 2026Read more →
dev⏱️ 6 min read
Unix Timestamps Explained: Why Your Dates Are Off By an Hour (or a Day)
A Unix timestamp is just a number, but converting it wrong is one of the most common date bugs in software. Here's what epoch time actually is, seconds vs. milliseconds, the timezone trap, and the 2038 problem — plus a free tool to convert instantly.
#unix timestamp#epoch time#timestamp converter
July 27, 2026Read more →
dev⏱️ 5 min read
Cron Expressions Explained: How to Write One Without Guessing
Five fields, one asterisk you always get wrong, and a handful of examples that cover 95% of real schedules. Here's how cron syntax actually works, plus a free tool that checks your expression before you deploy it.
#cron expression#cron job examples#crontab syntax
July 18, 2026Read more →
dev⏱️ 5 min read
Why Is My JSON Invalid? Common JSON Errors Explained (and How to Fix Them)
'Unexpected token' doesn't tell you what's actually wrong. Here are the JSON errors that show up 90% of the time, what causes each one, and how to spot them in seconds.
#json formatter#validate json online#invalid json error
July 16, 2026Read more →
dev⏱️ 7 min read
Regex Cheat Sheet 2026 — The Patterns You'll Actually Use (Email, URL, Phone, Password & More)
The regex patterns developers copy-paste the most, explained instead of just listed — plus the anchors, groups, and lookaheads that turn a pattern from 'works on my input' to actually correct.
#regex cheat sheet#regex patterns#email regex
July 14, 2026Read more →
dev⏱️ 5 min read
How Strong Is Your Password, Really? Length vs. Complexity in 2026
!@#$ doesn't make a password strong — length does. Here's what actually stops modern password-cracking hardware, and how to generate a password that holds up.
#password generator#strong password#password security
July 13, 2026Read more →
dev⏱️ 5 min read
How to Encode and Decode Base64 Online (Free) — And Why It Isn't Encryption
Convert text or files to Base64 and back in seconds — plus why Base64 only obscures data instead of protecting it, and where it actually shows up in everyday dev work.
#base64 encoder#base64 decode online#base64 to text
July 12, 2026Read more →
dev⏱️ 5 min read
How to Decode a JWT Token Online (Free) — What Header, Payload, and Signature Actually Mean
Paste a JWT and see its header, payload, and signature broken down instantly — plus what each claim means, why decoding isn't the same as verifying, and when a token is actually expired.
#jwt decoder#decode jwt online#jwt token
July 11, 2026Read more →
dev⏱️ 6 min read
Best Free Developer Tools Online 2025 — JSON, Base64, UUID & More
Discover the best free online developer tools in 2025. JSON formatter, Base64 encoder, URL encoder, UUID generator, password generator, QR code maker and more. No signup required.
#developer tools#free dev tools#json formatter
April 6, 2025Read more →