Guías claras y prácticas sobre las herramientas de Monu Tools. Sin relleno, solo lo que necesitas para avanzar.
Cómo funcionan el IRPF, el IVA y la indemnizacion por despido en España: los seis tramos de la escala del IRPF, la parte estatal y autonómica combinada, el mínimo personal, los tres tipos de IVA y las fórmulas de los 33 y 20 días. Cada cifra sigue los tipos oficiales de 2026, y cada guía enlaza con la calculadora para que pueda hacer sus propias simulaciones.
Cómo funciona el IRPF en 2026: tramos, cuota y tipo medio
Guía clara del IRPF 2026: los 6 tramos de la escala, el método del mínimo personal y un ejemplo práctico con base liquidable de 30.000 EUR.
Cómo funciona el IVA en España en 2026: tipos, base imponible y ejemplo práctico
Los tres tipos de IVA en España para 2026, qué es la base imponible, cómo calcular el IVA y a qué bienes y servicios se aplica cada tipo.
Indemnizacion por despido en España: cómo se calcula en 2026
Indemnizacion por despido en España: regla de 33 y 20 días, tope en mensualidades, ejemplo con 2.000 EUR y 10 años, regla transitoria de 2012.
Sueldo bruto y neto en España 2026: cómo se calcula tu nómina
Cómo calcular el sueldo neto en España 2026: cotización a la Seguridad Social (6,5 %), retención del IRPF, 12 o 14 pagas y ejemplo con 30.000 EUR.
Guías detalladas sobre temas de desarrollo, imágenes y nutrición, en inglés.
JSON is everywhere, in API responses, config files, and log lines, and almost all of it needs the same handful of fixes: make it readable, shrink it, convert it, or work out why a parser is choking on it. These guides walk through each job with real examples, and every one links to a tool that does the work right in your browser, so your data never leaves the page.
Why Is My JSON Invalid? How to Find and Fix the Error
The six mistakes that break JSON, how to read a parser error, and how to fix invalid JSON fast.
Pretty-Print vs Minify: When to Format JSON and When to Compress It
When to format JSON for readable diffs and debugging, when to minify it for size, and how to do both privately in your browser.
How to Convert JSON to CSV (and Keep Nested Data Sane)
Convert JSON to CSV without losing your nested objects: flattening, exploding arrays, delimiters, Excel BOM gotchas, and the round-trip back.
Turn a JSON Response into a TypeScript Interface in Seconds
Generate a TypeScript interface from any JSON response: optional fields, nullables, nested types, and where a single sample falls short.
YAML vs JSON: Which One Should Your Config Use?
YAML vs JSON compared for config files and APIs: syntax, comments, the Norway problem, indentation traps, TOML, and lossless conversion.
How to Minify JSON to Shrink API Payloads
What minifying JSON actually removes, the realistic 20 to 40 percent size win, and why server compression usually matters more.
Regular expressions look cryptic until you learn the handful of pieces they are built from. These guides cover the core syntax, capturing and named groups, lookahead and lookbehind, the greedy-versus-lazy distinction and the catastrophic backtracking to avoid, and why a giant email regex is the wrong tool. Every guide links the regex tester so you can try each pattern in your browser, where your text never leaves the page.
Regex Basics: Characters, Classes, Anchors, and Quantifiers
The core building blocks of regular expressions: literal characters, character classes, anchors, quantifiers, and the flags that change everything.
Capturing Groups, Named Groups, and Backreferences
How parentheses capture parts of a match, how to name them, how backreferences match repeated text, and how to use all three when replacing.
Lookahead and Lookbehind: Matching by Context
Lookarounds check what surrounds a position without consuming it. Learn positive and negative lookahead and lookbehind with practical examples.
Greedy, Lazy, and Catastrophic Backtracking
Why quantifiers grab as much as they can, how lazy matching reins them in, and how nested quantifiers cause the ReDoS slowdown to avoid.
Why You Should Not Validate Email With a Giant Regex
The full RFC email regex is thousands of characters, rejects valid addresses, accepts dead ones, and risks ReDoS. Here is what to do instead.
Base64, URL encoding, JWTs, and hashing turn up in every web stack, and the same misunderstandings turn up with them: that encoding is encryption, that decoding a token verifies it, that a hash can be reversed. These guides clear that up with plain explanations and worked examples, and each one links a tool that does the job right in your browser, so your data never leaves the page.
Base64 Explained: Why Encoding Is Not Encryption
What Base64 actually does, why it makes data about a third larger, when to use it, and why it protects nothing on its own.
URL Encoding Explained: When and Why to Percent-Encode
Why URLs use %20 and other percent codes, which characters are safe, and when to reach for encodeURIComponent instead of encodeURI.
How to Read a JWT, and Why Decoding Is Not Verifying
A JWT is three Base64url parts anyone can read. Learn how to decode one, what each part means, and why decoding proves nothing.
Hashing vs Encryption: What a Hash Can and Cannot Do
Hashing is one-way and keyless; encryption is two-way and needs a key. Learn the difference, why you cannot decrypt a hash, and when to use each.
How Passwords Should Be Stored: Salting, bcrypt, and Why Not SHA-256
Why a fast hash like SHA-256 is wrong for passwords, what a salt does, and why bcrypt, scrypt, and Argon2 are the right tools.
How Webhook Signatures Work: HMAC, Shared Secrets, and Timing-Safe Checks
How Stripe and GitHub prove a webhook is genuine using HMAC and a shared secret, and the timing-safe comparison most developers get wrong.
UUIDv4 vs UUIDv7: Why Time-Ordered IDs Make Better Database Keys
UUIDv4 is random and scatters database indexes; UUIDv7 is time-ordered and inserts in order. Learn the difference and when each one wins.
Data URIs: Embedding Images with Base64, and When It Backfires
Inlining an image as a Base64 data URI removes a request but breaks caching and adds 33% size. Learn the size rules and the better SVG trick.
How much protein you really need, how many calories your body burns, and what BMI does and does not tell you: these guides turn the numbers behind the calculators into plain, evidence-based answers. Every figure is sourced from research and health bodies, and each guide links the tool so you can run your own numbers.
How Much Protein Do You Need Per Day?
Work out how much protein per day you need from your bodyweight and activity level, with the official RDA, athlete ranges, and a worked example.
Protein Per Kg of Body Weight: What the Ranges Really Mean
Protein per kg of body weight, explained: the 0.8 to 2.2 g/kg ranges, who each fits, total vs lean mass, plus worked examples at 60, 80 and 100 kg.
How Much Protein to Build Muscle?
Protein for muscle gain explained: aim for 1.6 to 2.2 g/kg, why total intake wins, how to split meals, and why you also need a surplus and training.
How Much Protein Should You Eat to Lose Weight?
How much protein to lose weight: why a higher target of 1.6 to 2.4 g/kg in a deficit protects muscle, curbs hunger, and burns more energy.
How Many Calories Do You Need? BMR and TDEE Explained
Learn how a calorie calculator estimates your daily needs using the Mifflin-St Jeor BMR formula, activity multipliers, and TDEE, with a worked example.
BMR and TDEE: How Many Calories You Burn
What is BMR and TDEE? Learn how your body burns calories at rest, the three formulas, the activity factors, and how accurate the numbers really are.
What Is a Healthy BMI (and What It Misses)
What is a healthy BMI? See the formula, the WHO categories, a worked example, and the real limits of BMI as a health screening tool.
BMI vs Body Fat Percentage: Which Matters
BMI vs body fat percentage: what each number really measures, why they disagree, how to measure body fat at home, and healthy ranges by sex.
Images are usually the heaviest thing on a page, and a few decisions, the right format, the right size, sensible compression, decide whether they load fast or drag everything down. These guides cover choosing between JPEG, PNG, WebP and AVIF, compressing without visible loss, converting iPhone HEIC photos, stripping hidden EXIF location data, resizing properly (and the DPI myth), and SVG versus PNG. Each links a tool that does the job right in your browser, so your images never leave the page.
Image Formats for the Web: JPEG, PNG, WebP, and AVIF
What sets JPEG, PNG, WebP, and AVIF apart, how much smaller the modern formats are, and a simple rule for which one to use.
How to Compress Images Without Losing Quality
What image compression really trades away, where the quality sweet spot is, and the steps that shrink a file without a visible drop.