Browse developer tools by category with support for multiple language interfaces and quick search.
Convert URI components, full URIs, and form encoding in real time
Free online URL encoder and decoder. Convert URI components, full URIs, and form encoding in real time, handle spaces and plus signs in query parameters correctly, and keep history only in this browser.
Decode Unicode escape sequences online, convert code points and HTML entities
Free Unicode decoder online. Decode Unicode escape sequences, HTML entities, code points, and UTF-8 bytes, then encode plain text back to Unicode escapes when needed. Useful for API payloads, logs, and multilingual text debugging, with all processing kept in your browser.
Chain Base64, JWT, hashes, PBKDF2, and AES-GCM with browser-side salted encryption workflows
A local-first encoding and cryptography workbench. Combine Base64/Base64URL, Hex, URL, HTML, JWT, SHA, HMAC, PBKDF2, and AES-GCM operations into repeatable recipes without uploading keys or input.
Decode JWT tokens and verify HS256 signatures online
Decode JWT tokens online: three-section decoding, HS256 verification, and human-friendly time claims, all processed locally in your browser.
Generate UUID v4/v7 online in bulk
Online UUID generator: bulk-generate secure-random v4 and time-ordered v7 UUIDs, toggle uppercase/hyphen/braced GUID formats, and copy as text or JSON — all locally in your browser.
Compute MD5/SHA256 hashes online and verify files
Online MD5 hash generator: get MD5/SHA-1/SHA-256/SHA-384/SHA-512 at once from text or files, with uppercase toggle and automatic checksum comparison — all local, nothing uploaded.
Parse and build crontab & Quartz expressions with next runs
Online Cron expression tool: parse 5-field crontab and 6-field Quartz (seconds), validate as you type, translate patterns to plain language, and see the next 5 run times in your timezone — all local.
Turn CSV into a JSON array online, with type inference and CJK-safe parsing
Free online CSV to JSON converter. Paste or upload .csv/.tsv for instant conversion: comma/semicolon/tab auto-detection, quoted fields parsed correctly, optional type inference (all-strings mode), three empty-cell policies, 16+ digit integers kept as strings, and garbled-text detection.
Run Python 3.8-3.12 with file uploads, project folders, and popular libraries
Free online Python compiler for 3.8-3.12. Upload CSV, Excel, fonts and .py files, manage project folders, use NumPy/Pandas/Matplotlib, and export ZIP.
Format, beautify, and minify SQL online across 20 dialects
Free online SQL formatter and beautifier with minify. 20 SQL dialects, three keyword-case modes, indent width and blank-line controls; line comments convert to block comments when minifying so nothing gets swallowed. All local.
Run PHP online instantly, test snippets in PHP 7.4-8.5, and compare output in your browser
Free PHP code runner to run PHP online, execute snippets, test PHP code, and compare PHP 7.4-8.5 behavior in your browser. No Apache, Nginx, or local setup. Powered by local WASM execution with syntax highlighting, examples, history, and shareable links.
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