Free Online Developer Tools

30+ fast, private tools. All processing in your browser. No signup required.

T Text & Encoding

B64

Base64 Encoder/Decoder

Convert text and files to/from Base64 encoding.

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URL Encoder/Decoder

Encode or decode URL strings instantly.

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YAML ↔ JSON

Convert between YAML and JSON formats bidirectionally.

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Aa

Case Converter

12+ case formats: camelCase, snake_case, kebab-case & more.

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Remove Duplicates

Deduplicate lines with sorting and filtering options.

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</> Developer Tools

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JSON Formatter

Format, validate, and minify JSON with syntax highlighting.

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Regex Tester

Test regular expressions with real-time matching and explanation.

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Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512, CRC32 hashes.

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SQL Formatter

Format, indent, and beautify SQL queries.

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HTML Beautifier

Format, indent, and minify HTML code instantly.

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CSS Beautifier

Format, indent, and minify CSS stylesheets.

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JS

JS Beautifier

Format, indent, and minify JavaScript code.

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XML

XML Formatter

Format, validate, and beautify XML with syntax highlighting.

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MD

Markdown Preview

Write Markdown with live rendered preview and toolbar.

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Data & Converters

CSV

CSV → JSON

Convert CSV data to JSON with custom delimiters.

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JSON

JSON → CSV

Export JSON arrays to CSV with nested object flattening.

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CSV Viewer

View CSV as sortable, searchable, editable table.

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0x

Number Base Converter

Convert between binary, octal, decimal, hex with BigInt.

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Timestamp Converter

Convert Unix timestamps with timezone support and batch mode.

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Color Converter

Convert HEX, RGB, HSL, CMYK with harmonies & contrast check.

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Generators

UUID

UUID Generator

Generate UUID v4 in bulk with format options.

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Password Generator

Cryptographically secure passwords with strength meter.

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Lp

Lorem Ipsum

Generate paragraphs, sentences, or words of placeholder text.

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Cron Generator

Build cron expressions with visual editor and next-run preview.

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📸 Image & PDF

Image Compressor

Reduce image file size with quality slider and batch mode.

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PNG

PNG → JPG

Convert PNG to JPG with quality and background color options.

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JPG

JPG → PNG

Convert JPG to PNG with optional resize and crop.

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PDF

Image → PDF

Convert images to PDF with page size and layout options.

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PDF Merge

Combine multiple PDFs with drag-to-reorder.

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PDF Split

Extract pages or split PDF by page range.

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📊 Text Analysis

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Text Diff

Compare two texts with unified and side-by-side diff views.

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Word Counter

Real-time word, character, sentence count with reading time.

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