63 tools 100% local No signup No tracking Free forever

Your text toolbox.
Local. Private. Free.

63 text utilities that run 100% in your browser. JSON formatter, password generator, UUIDs, find and replace, Base64, hashes, slugs, Lorem Ipsum and everything else you need to manipulate text day to day. No server, no account, no ads.

Nothing leaves your device. Ever.

Find a tool → See featured By category

aldeacode://browser-runtimeLIVE

Latency: <1 msUpload: 0 BCost: $0

Utilities

all bilingual

Find the tool you need

Search by name, keyword or category. Press / any time to focus the search.

Basic text

Add Prefix / Suffix

Insert text at the start and end of every line.

Basic text

Remove Line Breaks

Collapse text into a single line, or split it into N words per line.

Basic text

Remove Duplicate Lines

Keep only the first occurrence of each line.

Basic text

Remove Empty Lines

Strip blank lines from a list or paragraph.

Basic text

Remove Extra Spaces

Trim leading, trailing or duplicated spaces, your choice.

Basic text

Remove Lines Containing…

Filter out (or keep) every line that matches a string or regex.

Basic text

Sort Text Lines

Sort alphabetically or numerically, asc or desc.

Basic text

Case Converter

UPPER, lower, Title, Sentence, aLtErNaTiNg or iNVERSE.

Basic text

Remove Accents

Strip diacritics from any letter, keep ñ if you want.

Basic text

Find and Replace Text

Literal or regex search & replace, with optional case sensitivity.

Basic text

Merge Text Lines

Interleave 2 or 3 lists line-by-line with a custom separator.

Basic text

Word & Character Counter

Live counts for characters, words, sentences, lines and word frequency.

Basic text

Delimited Column Extractor

Extract one column from CSV, TSV or any delimited text.

Basic text

Gendered Keywords (Spanish)

Classify Spanish keywords by gender and number, heuristic.

Basic text

URL List Cleaner

Reduce a list of URLs to their root domain (no paths or queries).

Format

ASCII to Unicode Converter

Encode text into code points (decimal, hex, JS escape) and back.

Numeration

Number Each Line

Add sequential numbers (1., 2., 3.…) to every line.

Obfuscation

Binary Code Translator

Convert text to UTF-8 binary and back.

Obfuscation

Disemvowel Tool

Strip every vowel from your text. Light obfuscation, big reduction.

Obfuscation

Encryption Generator

Three classical ciphers (Caesar, Vigenère, XOR) for learning and puzzles.

Obfuscation

Reverse Text

Flip your text character by character, works with emoji and accents.

Obfuscation

ROT13 Caesar Cipher

Rotate every letter by 13 places. Apply twice to recover the original.

Obfuscation

Word Scrambler

Shuffle the letters inside each word. Random output every run.

Format

JSON Formatter and Validator

Pretty-print, minify or validate JSON in your browser.

Format

Base64 Encoder and Decoder

Encode any text to Base64 and back. UTF-8 safe, URL-safe variant supported.

Format

URL Encoder and Decoder

Percent-encode strings for URLs and decode back. Component or full URI mode.

Format

HTML Entities Encoder and Decoder

Encode <, >, & and friends to HTML entities, or decode them back.

Combinations

Combination Generator

Cartesian product of 2 to 4 lists. Builds every combination automatically.

Combinations

Line Combination Generator

Pair lists line by line (zip). Useful for parallel data joining.

Combinations

Permutation Generator

Every reordering of N items, with size guard for factorial growth.

Numeration

Sequential Number List Generator

Build a list of numbers from start to end with custom step, prefix, suffix and padding.

Numeration

Online Tally Counter

Multiple named counters with +/-, custom step and local persistence.

Generators

UUID v4 Generator

Generate cryptographically random UUID v4 identifiers in bulk.

Generators

Strong Password Generator

Cryptographically random passwords with full character-set control.

Generators

Lorem Ipsum Generator

Classic placeholder text by words, sentences or paragraphs.

Generators

URL Slug Generator

Convert any text into a URL-safe slug. Unicode-aware, batch mode by line.

Developer

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Live, multi-format.

Developer

SHA Hash Generator

Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes locally with Web Crypto.

Format

HTML Tag Stripper

Remove HTML tags from any text and keep only the readable content.

Format

Markdown Stripper

Convert markdown to plain text by stripping syntax markers.

Developer

JWT Decoder

Decode JSON Web Tokens to inspect the header and payload locally.

Developer

Regex Tester (JavaScript Flavor)

Test JavaScript regular expressions live with match highlighting and capture groups.

Developer

Text Diff Comparator

Compare two texts line by line and visualise added, removed and unchanged lines.

Format

CSV ↔ JSON Converter

Convert CSV to JSON arrays of objects and back, with header detection.

Developer

Color Converter (Hex / RGB / HSL)

Convert between hex, rgb() and hsl() with live preview.

Developer

Date Difference Calculator

Days, weeks, months and years between two dates. Doubles as an age calculator.

Developer

WCAG Contrast Checker

Check text and background contrast against WCAG AA and AAA, with a live preview.

Generators

Random Number Generator

Cryptographically secure random numbers, integers or decimals, with no repeats option.

Developer

Cron Expression Builder

Build cron expressions visually with presets and a plain language preview.

Generators

QR Code Generator

Generate a QR code from any text, URL, Wi-Fi or vCard. PNG and SVG download.

Format

Markdown to HTML and HTML to Markdown

Convert Markdown to HTML or HTML back to Markdown, with GFM and code fences.

Format

SQL Formatter

Format SQL across 12 dialects with control over keyword case and indent size.

Obfuscation

Fancy Text Generator

Convert plain text into 20+ Unicode styles for Instagram, TikTok, Twitter and Discord.

Generators

Random Pick from List

Paste a list of names or items, pick one or many at random. Raffles, decisions, sampling.

Format

Image Resizer (in your browser)

Resize JPG, PNG and WebP images by percentage or exact pixels. Nothing uploaded.

Generators

Yes/No, Coin Flip, Dice Roller, Rock Paper Scissors

Four classic random decisions in one tool. Yes or no, heads or tails, dice from d4 to d100, rock paper scissors.

Basic text

Reading Time, Speaking Time and Word Count

Estimate how long your text takes to read silently, present, narrate or podcast.

Generators

Random Color Palette Generator

Generate harmonious color palettes (analogous, triadic, complementary, monochromatic, tetradic, random).

Obfuscation

Aesthetic Text Wrapper

Wrap text with sparkles, hearts, moons, dots and other decorative Unicode for bios and captions.

Generators

Pomodoro Timer

Focus timer with 25 min sessions, 5 min short breaks and a long break every four pomodoros.

Format

Image to Base64 Converter

Convert any image to a Base64 string, data URI, CSS background, or <img> tag. Stays in your browser.

Format

PDF Page Counter

Count pages in one or many PDF files in your browser. Drag, drop, get the count.

Combinations

Anagram Solver

Generate every unique permutation of a set of letters. Word puzzles, Scrabble, anagrams.

The 8 most used

The ones people open first. Good starting point if you are new here.

See all →

Format

JSON Formatter and Validator

Pretty-print, minify or validate JSON in your browser.

Generators

Strong Password Generator

Cryptographically random passwords with full character-set control.

Generators

UUID v4 Generator

Generate cryptographically random UUID v4 identifiers in bulk.

Format

Base64 Encoder and Decoder

Encode any text to Base64 and back. UTF-8 safe, URL-safe variant supported.

Developer

Regex Tester (JavaScript Flavor)

Test JavaScript regular expressions live with match highlighting and capture groups.

Basic text

Find and Replace Text

Literal or regex search & replace, with optional case sensitivity.

Generators

URL Slug Generator

Convert any text into a URL-safe slug. Unicode-aware, batch mode by line.

Developer

SHA Hash Generator

Compute SHA-1, SHA-256, SHA-384 and SHA-512 hashes locally with Web Crypto.

Browse by use case

Curated stacks with pro combos and a tool-by-tool justification.

For developers JSON, JWT, regex, hashes 12 tools curated For SEO Slugs, accents, keywords 10 tools curated For writers Words, case, citations 10 tools curated For data CSV, JSON, columns 10 tools curated

Complete catalogue

All 45 tools, on a single sheet

Every category with its full list. Direct click to any tool.

Basic text

Format

Obfuscation

Combinations

Numeration

Generators

Developer

All 7 categories

Every one of the 63 tools, grouped by family.

Basic text

Manipulate, clean and reshape lines of text. Sort, dedupe, replace, count, extract.

Add Prefix / SuffixInsert text at the start and end of every line.Remove Line BreaksCollapse text into a single line, or split it into N words per line.Remove Duplicate LinesKeep only the first occurrence of each line.Remove Empty LinesStrip blank lines from a list or paragraph.Remove Extra SpacesTrim leading, trailing or duplicated spaces, your choice.Remove Lines Containing…Filter out (or keep) every line that matches a string or regex.Sort Text LinesSort alphabetically or numerically, asc or desc.Case ConverterUPPER, lower, Title, Sentence, aLtErNaTiNg or iNVERSE.Remove AccentsStrip diacritics from any letter, keep ñ if you want.Find and Replace TextLiteral or regex search & replace, with optional case sensitivity.Merge Text LinesInterleave 2 or 3 lists line-by-line with a custom separator.Word & Character CounterLive counts for characters, words, sentences, lines and word frequency.Delimited Column ExtractorExtract one column from CSV, TSV or any delimited text.Gendered Keywords (Spanish)Classify Spanish keywords by gender and number, heuristic.URL List CleanerReduce a list of URLs to their root domain (no paths or queries).Reading Time, Speaking Time and Word CountEstimate how long your text takes to read silently, present, narrate or podcast.

Format

Convert between text encodings and data formats. JSON, Base64, URL, HTML, CSV.

ASCII to Unicode ConverterEncode text into code points (decimal, hex, JS escape) and back.JSON Formatter and ValidatorPretty-print, minify or validate JSON in your browser.Base64 Encoder and DecoderEncode any text to Base64 and back. UTF-8 safe, URL-safe variant supported.URL Encoder and DecoderPercent-encode strings for URLs and decode back. Component or full URI mode.HTML Entities Encoder and DecoderEncode <, >, & and friends to HTML entities, or decode them back.HTML Tag StripperRemove HTML tags from any text and keep only the readable content.Markdown StripperConvert markdown to plain text by stripping syntax markers.CSV ↔ JSON ConverterConvert CSV to JSON arrays of objects and back, with header detection.Markdown to HTML and HTML to MarkdownConvert Markdown to HTML or HTML back to Markdown, with GFM and code fences.SQL FormatterFormat SQL across 12 dialects with control over keyword case and indent size.Image Resizer (in your browser)Resize JPG, PNG and WebP images by percentage or exact pixels. Nothing uploaded.Image to Base64 ConverterConvert any image to a Base64 string, data URI, CSS background, or <img> tag. Stays in your browser.PDF Page CounterCount pages in one or many PDF files in your browser. Drag, drop, get the count.

Obfuscation

Hide, scramble or transform text for puzzles, demos and quick obfuscation.

Binary Code TranslatorConvert text to UTF-8 binary and back.Disemvowel ToolStrip every vowel from your text. Light obfuscation, big reduction.Encryption GeneratorThree classical ciphers (Caesar, Vigenère, XOR) for learning and puzzles.Reverse TextFlip your text character by character, works with emoji and accents.ROT13 Caesar CipherRotate every letter by 13 places. Apply twice to recover the original.Word ScramblerShuffle the letters inside each word. Random output every run.Fancy Text GeneratorConvert plain text into 20+ Unicode styles for Instagram, TikTok, Twitter and Discord.Aesthetic Text WrapperWrap text with sparkles, hearts, moons, dots and other decorative Unicode for bios and captions.

Combinations

Generate every combination or permutation from input lists. With size guards.

Combination GeneratorCartesian product of 2 to 4 lists. Builds every combination automatically.Line Combination GeneratorPair lists line by line (zip). Useful for parallel data joining.Permutation GeneratorEvery reordering of N items, with size guard for factorial growth.Anagram SolverGenerate every unique permutation of a set of letters. Word puzzles, Scrabble, anagrams.

Numeration

Generate or annotate numeric sequences. Counters and ranges.

Number Each LineAdd sequential numbers (1., 2., 3.…) to every line.Sequential Number List GeneratorBuild a list of numbers from start to end with custom step, prefix, suffix and padding.Online Tally CounterMultiple named counters with +/-, custom step and local persistence.

Generators

Produce new content: passwords, UUIDs, slugs, lorem ipsum.

UUID v4 GeneratorGenerate cryptographically random UUID v4 identifiers in bulk.Strong Password GeneratorCryptographically random passwords with full character-set control.Lorem Ipsum GeneratorClassic placeholder text by words, sentences or paragraphs.URL Slug GeneratorConvert any text into a URL-safe slug. Unicode-aware, batch mode by line.Random Number GeneratorCryptographically secure random numbers, integers or decimals, with no repeats option.QR Code GeneratorGenerate a QR code from any text, URL, Wi-Fi or vCard. PNG and SVG download.Random Pick from ListPaste a list of names or items, pick one or many at random. Raffles, decisions, sampling.Yes/No, Coin Flip, Dice Roller, Rock Paper ScissorsFour classic random decisions in one tool. Yes or no, heads or tails, dice from d4 to d100, rock paper scissors.Random Color Palette GeneratorGenerate harmonious color palettes (analogous, triadic, complementary, monochromatic, tetradic, random).Pomodoro TimerFocus timer with 25 min sessions, 5 min short breaks and a long break every four pomodoros.

Developer

Inspect, decode and compare. Hashes, JWT, regex, diff, color.

Unix Timestamp ConverterConvert between Unix timestamps and human-readable dates. Live, multi-format.SHA Hash GeneratorCompute SHA-1, SHA-256, SHA-384 and SHA-512 hashes locally with Web Crypto.JWT DecoderDecode JSON Web Tokens to inspect the header and payload locally.Regex Tester (JavaScript Flavor)Test JavaScript regular expressions live with match highlighting and capture groups.Text Diff ComparatorCompare two texts line by line and visualise added, removed and unchanged lines.Color Converter (Hex / RGB / HSL)Convert between hex, rgb() and hsl() with live preview.Date Difference CalculatorDays, weeks, months and years between two dates. Doubles as an age calculator.WCAG Contrast CheckerCheck text and background contrast against WCAG AA and AAA, with a live preview.Cron Expression BuilderBuild cron expressions visually with presets and a plain language preview.

Privacy, in receipts

Same paste. Different planet.

Most online tools sell themselves as free. The price is your input. Here is the data flow side by side.

Most online tools

A typical online tool

Hosted parser, server-side processing, persistent logs.

01
Paste your text You hit Run.
02
POST /api/process Up to your full input over HTTPS.
03
Server logs the body Stored 30 to 365 days, often longer.
04
Maybe trained on Buried in the terms, where you did not look.

Every tool here

An AldeaCode utility

Pure JavaScript in your tab, no backend involved.

01
Paste your text You hit Run.
02
Zero network calls Open DevTools, watch the empty list.
03
Browser does the work Same machine that ran the page.
04
Result back to you Nothing left, nothing logged.

Receipt for this page

Outbound bytes since paste: 0
Server-side processing: None
Persistence of input: Never
Telemetry / fingerprint: None

Verify it yourself.

Open DevTools, switch to the Network tab, paste anything into any tool. You will see no XHR, no fetch, no beacons. The Web Crypto and DOM APIs do all the work, in your tab.