Text & Code tools. In your browser.
Every Text & Code tool in the Digital Heroes library, client-side, free, no signup. Nothing is uploaded or saved to a server.
A free online tool by Digital HeroesBase64 Encode/Decode
Encode & decode text and files to/from Base64.
Caesar / ROT13 Cipher
Encrypt/decrypt with Caesar shift, ROT13 & Atbash — with brute-force decode.
Case Converter
Free case converter for code variables. Type once, see all 13 cases live: UPPERCASE, lowercase, Title, camelCase, PascalCase,…
Character Counter
Free character counter for content. Count characters, words, sentences, paragraphs, lines, reading time. Tweet, SEO title, meta…
Code Formatter
Beautify or minify JSON, CSS, HTML & JavaScript locally.
Code Playground
Write HTML, CSS & JS with a live preview and console — a local CodePen.
Text + Large Color Contrast Checker
Free color contrast checker. WCAG AA and AAA ratios for normal text, large text, and UI. Live swatch preview, hex and RGB input,…
Brand Color Palette Extractor
Free color palette extractor. Upload image, get dominant + 8-color palette. Hex, RGB, HSL output. Click swatch to copy. Powered by…
Cron Expression Helper
Translate a cron expression to plain English and preview the next run times.
CSV ↔ JSON
Convert CSV to JSON and back, in the browser.
CSV Viewer & Editor
Open a CSV as a sortable, filterable, editable table — export to CSV/JSON.
cURL Converter
Paste a curl command and get fetch, Axios, Python requests & PowerShell code instantly.
Fancy Text Generator
Turn text into ð›ð¨ð¥ð, ð‘–ð‘¡ð‘Žð‘™ð‘–ð‘, ð“ˆð’¸ð“‡ð’¾ð“…𓉠& 20+ unicode styles — copy for bios & posts.
Hash Generator
SHA-1/256/384/512 of text or files via Web Crypto.
HTML Entities Encoder
Encode & decode HTML entities and escape special characters.
HTML to Markdown Content
Free HTML to Markdown content converter. Paste HTML, live side-by-side preview. GFM extension (tables, strikethrough, task lists).…
JSON Diff
Semantic JSON comparison — structural diff that ignores key order and shows added/removed/changed paths.
JSON Formatter
Beautify, minify & validate JSON instantly.
JSON to TypeScript
Turn JSON into TypeScript interfaces/types with flexible options — instantly.
JSON Validator
Free JSON validator with deep diagnostics. Paste JSON or NDJSON for strict parse, common-mistake detector, structure stats (depth,…
JWT Decoder
Decode a JWT’s header & payload locally (no data sent).
Markdown Editor
Write Markdown with live preview & export to HTML.
Markdown Table Generator
Build a Markdown (or CSV/HTML) table from an editable grid.
Markdown to HTML
Free Markdown to HTML development converter. Live side-by-side preview, GFM CommonMark mode, copy HTML, download .html. Powered by…
HTML / CSS / JS Minifier
Minify HTML, CSS & JS with safe whitespace/comment stripping — live size savings readout.
Morse Code Translator
Translate text ↔ Morse code with adjustable audio playback & flashing.
Number Base Converter
Convert between binary, octal, decimal & hexadecimal.
Number to Words
Convert numbers to words — international & Indian (lakh/crore) systems, plus currency mode.
Regex Tester
Free regex tester tool. Live URL regex matches, capture groups, named groups, replace preview. JavaScript regex flavor with all flags.…
Roman Numeral Converter
Convert numbers to Roman numerals and back (1–3,999,999).
SQL Formatter
Beautify or minify SQL for many dialects — instant, local, no upload.
SQL Playground
Run SQL on an in-browser SQLite database; import CSVs as tables (one-time engine download).
String Escaper
Escape & unescape strings for JSON, JS, HTML, URL, SQL, CSV, regex & unicode.
SVG Optimizer Tool
Free SVG optimizer tool. Strip XML comments, editor metadata (Inkscape, Adobe, Sketch), redundant default attributes. Rounds decimals.…
Text Cleaner & Line Tools
Sort, dedupe, reverse, trim, find-replace & reformat lines of text.
Text Diff
Compare two texts and highlight every change.
Text & File Encryptor
Password-encrypt text or files with AES-256 (Web Crypto) — fully offline.
Text Summarizer
Summarize long text into key sentences or bullets — adjustable length, fully on-device.
Text ↔ Binary / Hex
Convert text to binary, hex, octal, decimal or ASCII codes — and back.
Timestamp Converter
Convert Unix timestamps ↔ human dates across time zones.
Title Case Converter
Free title case converter with AP, Chicago, MLA, APA, NYT, Wikipedia sentence-case modes. Handles prepositions per style. Browser-only,…
URL Encoder & Parser
Encode/decode URLs and break them into query parameters.
UUID Generator
Generate v4 UUIDs and ULIDs in bulk.
XML Formatter
Beautify, minify & validate XML, and convert XML ↔ JSON — in your browser.
YAML Validator
Free YAML validator. Live syntax check, parse-error line + col, indentation rules, JSON-equivalent view, common-mistake detector (tabs,…
ZIP Extractor & Creator
Open, inspect & extract ZIP files, or bundle your files into a new ZIP — locally.
