rellit.de

Fast web tools that want nothing from you.

No account, no uploads, no tracking. Convert, format, hash, encode – rellit.de works in your browser and forgets you afterwards.

Format Converter

Converts JSON, YAML, TOML and XML into each other directly in your browser – no upload, no server.

JSON · YAML · TOML · XML

Formatter

Indents JSON, YAML, TOML and XML properly – with per-format settings, syntax errors explained in detail and syntax highlighting.

JSON · YAML · TOML · XML

Hash Calculator

Computes MD5, SHA and CRC32 hashes right in your browser – single value or line-by-line for whole lists.

MD5 · SHA-1/256/384/512 · SHA3 · CRC32

Encoder & Decoder

Encodes and decodes Base64, URL, hex, Base32, HTML entities, Unicode escapes and punycode – right in your browser.

Base64 · URL · Hex · HTML · Punycode

bcrypt Generator & Verifier

Generates and verifies bcrypt hashes and breaks down every part: version, cost factor, salt and digest.

Hash · Verify · erklärt

Argon2 Generator & Verifier

Generates and verifies Argon2 hashes in all three variants – including an explanation of version, memory, iterations and parallelism.

argon2id · argon2i · argon2d

Data-URL Generator & Viewer

Converts images and other files into Base64 data URLs and displays pasted data URLs as images again.

Bild · SVG · Font → Base64

JWT Decoder

Splits JSON Web Tokens into header, payload and signature, explains every claim and verifies the signature.

HS256 · RS256 · ES256 · EdDSA

Cron Generator

Translates cron expressions into plain words, shows the next run times and builds new expressions from dropdowns.

crontab · GitHub Actions · Kubernetes

Regex-Tester

Tests regular expressions live in your browser for multiple flavors (JavaScript, Java, PCRE, Python): match highlighting, capture groups, a replace preview and a cheat sheet – protected against hanging catastrophic-backtracking patterns.

JavaScript · Java · PCRE · Python

Timestamp-Konverter

Converts Unix timestamps into a date and back – seconds to nanoseconds, ISO 8601, RFC 3339 and any time zone.

Unix · Epoch · ISO 8601

Diff-Viewer

Compares two texts or source files by line, word or character and highlights every change in colour – side by side or unified.

Zeilen · Wörter · Zeichen

Farb-Konverter

Converts HEX, RGB, HSL, HWB, OKLCH, Lab and CMYK into each other, checks WCAG contrast and builds a lightness scale.

HEX · RGB · HSL · OKLCH

Farbschema-Generator

Turns one colour into a whole scheme: 3–5 harmonious colours with eleven steps each, neutrals and status colours – as CSS, Tailwind, SCSS, shadcn/ui or MUI.

Palette · Abstufungen · Export

QR-Code-Generator

Creates QR codes for links, Wi-Fi, contacts and more – with your own logo in the centre, custom colours and shapes, as SVG and PNG.

Logo · WLAN · vCard

UUID-Generator

Generates UUIDs in every common version and breaks any UUID down bit by bit: version, variant, timestamp, node ID.

v1 · v4 · v7 · GUID

Lorem-Ipsum-Generator

Creates placeholder text by paragraphs, sentences, words or list items – as text, HTML or Markdown, reproducible via a seed.

Text · HTML · Markdown

OIDC & OAuth 2.0 Explorer

Explains OpenID Connect and OAuth 2.0 step by step: authorization code with PKCE, device flow and client credentials – with genuinely computed values and discovery import.

Flows · PKCE · ID-Token