100% In-Browser & Private — your data never leaves this device

All tools

Every PeachTools utility runs locally in your browser. Pick a category or jump straight into a tool — your inputs are never uploaded for processing.

50 tools · 5 categories · 100% in-browser

Developer

PeachTools developer utilities run entirely in your browser so API payloads, tokens, and config never leave your device. Format JSON and CSS, convert CSV or XML, decode JWTs, parse cron, and build agent skills without creating an account.

Private, in-browser utilities for everyday engineering workflows — JWT decoding, JSON formatting, cron parsing, URL encoding, and more.

JWT Decoder

Decode JSON Web Tokens instantly. View header, payload, signature, and expiration — 100% in your browser.

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JSON to TypeScript Generator

Convert JSON objects into TypeScript interfaces instantly. Paste API responses and get clean, export-ready types — 100% in your browser.

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Cron Expression Parser

Parse and visualize cron expressions in plain English. Supports Unix and Quartz syntax — instantly, in your browser.

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SQL Schema Transpiler

Convert SQL CREATE TABLE scripts into JSON schema or TypeScript interfaces. Parse database definitions instantly in your browser.

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JSON Formatter

Pretty-print, minify, or explore JSON in a collapsible tree — instant validation, 100% in your browser.

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XML Formatter

Pretty-print or minify XML with clear error messages — private, fast, and fully in-browser.

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XML to JSON Converter

Convert XML to JSON instantly in your browser. Attributes and nested elements become structured JSON — nothing is uploaded.

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JSON to XML Converter

Convert JSON objects into well-formed XML online — private processing in your browser with downloadable output.

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JSON to YAML Converter

Convert JSON to YAML for Kubernetes, CI, and app configs — fast and private in your browser.

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YAML to JSON Converter

Convert YAML to JSON online without uploading configs — ideal for APIs, CI, and local debugging.

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JSON to CSV Converter

Convert JSON arrays of objects into CSV for Excel and sheets — privately in your browser.

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Code & Text Diff Checker

Compare two blocks of text, JSON, or code side-by-side and spot every change — unified diff, 100% in your browser.

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cURL to Code Converter

Paste a cURL command from DevTools or API docs and convert it to Python, JavaScript, Go, PHP, and more — privately on-device.

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Base64 ↔ Image Converter

Encode images to Base64 data URLs for CSS/HTML, or decode Base64 payloads to preview and download — FileReader + canvas, fully local.

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Agent Skill Builder (SKILL.md)

Author, lint, and package Cursor / Claude Agent Skills as SKILL.md folders — presets, trigger checks, and ZIP export entirely in your browser.

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URL Encoder / Decoder

Encode or decode URLs and inspect query parameters in a clean table — fully private, in-browser.

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CSV to JSON

Convert CSV or TSV into JSON arrays of objects with auto delimiter detection — private and in-browser.

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CSS Formatter

Pretty-print or minify CSS online — fast, private formatting with no uploads.

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Unix Timestamp Converter

Convert Unix timestamps (seconds or milliseconds) to ISO dates and back — private, instant, in-browser.

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Regex Tester

Test regular expressions with live matches, capture groups, and replace — 100% in your browser.

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Base64 Encode / Decode

Encode or decode text as standard or URL-safe Base64 — private and instant.

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QR Code Generator

Create PNG or SVG QR codes from any URL or text — generated locally in your browser.

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HTML Encoder / Decoder

Escape or unescape HTML entities for safe embedding — private and instant.

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SQL Formatter

Pretty-print or minify SQL with dialect-aware formatting — PostgreSQL, MySQL, SQLite, and more.

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HTML Formatter

Beautify or minify HTML markup online — private, fast, and fully client-side.

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JavaScript Formatter

Pretty-print or lightly minify JavaScript in your browser — no uploads.

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Cron Expression Builder

Build Unix cron schedules from fields and presets, with a plain-English preview — fully in-browser.

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JWT Encoder

Create HS256/384/512 (or unsigned) JSON Web Tokens from a JSON payload — private companion to the JWT Decoder.

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Meta Tag / Open Graph Generator

Generate title, description, Open Graph, and Twitter card tags with a live social preview — fully client-side.

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robots.txt & llms.txt Generator

Generate robots.txt crawl rules and an llms.txt site summary for AI agents — private and downloadable.

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Security

Generate strong secrets and checksums locally with the Web Crypto API. Hash text or files, create passphrases and API keys, and inspect tokens without sending sensitive material to a server.

Client-side security helpers for hashing, secrets, and tokens — nothing is uploaded or logged.

Secure Passphrase & Secret Generator

Generate cryptographically strong passwords, passphrases, API keys, UUIDs, and keypairs with Web Crypto — nothing is logged or uploaded.

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Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 digests for text or files — Web Crypto in your browser, nothing uploaded.

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UUID Generator

Generate and validate RFC 4122 UUID v4 values with Web Crypto — nothing is logged or uploaded.

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HMAC Generator

Compute HMAC-SHA1/256/512 signatures for webhooks and APIs — Web Crypto in your browser.

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PDF

Edit PDFs privately on your device: merge and split documents, redact pages, reorder or rotate sheets, and turn images into PDFs — ideal when uploads are off-limits.

Fast PDF utilities that merge, split, redact, and organize files entirely in your browser.

PDF Redactor / PII Eraser

Black out SSNs, account numbers, and signatures on PDFs before you share them — 100% in your browser, never uploaded.

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PDF Merger & Page Splitter

Merge PDFs or extract selected pages instantly in your browser — no upload, no watermark, no waiting on a server.

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PNG / JPG to PDF Converter

Turn receipt photos, contracts, or scans into a clean multi-page PDF — pdf-lib + canvas, processed only on your device.

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PDF Page Organizer & Rotator

Visually reorder, rotate, and delete PDF pages with thumbnail drag-and-drop — pdf.js + pdf-lib, entirely in-browser.

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Text

Measure drafts, clean tabular data, and preview Markdown with tools that keep your writing on-device. Use character meters for social posts and SEO snippets without pasting into third-party counters.

Word counts, Markdown preview, CSV cleanup, and other text tools with zero server round-trips.

CSV / Excel De-Duplicator

Remove duplicate rows and clean columns in large CSVs without crashing Excel — streamed and processed in your browser.

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Markdown to HTML / Live Previewer

Draft READMEs and docs in a fast side-by-side Markdown editor with live HTML preview and clean export — fully client-side.

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Text Statistics

Count words, characters, sentences, reading/speaking time, and keyword density — with Twitter and SEO length meters.

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Case Converter

Convert text between camelCase, snake_case, kebab-case, PascalCase, and more — locally.

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Image

Process screenshots, icons, and SVGs locally. Strip EXIF location data, compress images, rasterize SVG, recolor vectors, and export favicon packs without uploading assets to PeachTools.

Compress, convert, and inspect images locally — EXIF stripping, SVG tools, favicons, and more.

EXIF & Location Stripper

Strip GPS coordinates, camera model, and timestamps from photos before publishing — canvas redraw, 100% in your browser.

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SVG Color Swapper

Recolor SVG icons and export CSS variables or Tailwind color tokens — no Figma required, fully in-browser.

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Social Aspect Ratio Resizer

Crop one image into LinkedIn, YouTube, X, Instagram, and more exact sizes — private canvas processing in your browser.

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Image Compressor (WebP / JPEG)

Shrink photo file sizes for upload limits without sending private images to a server — browser-side compression you control.