Free online tools that run entirely in your browser.

Format, validate, and inspect JSON locally in the browser.

Use it for API payloads, config snippets, nested examples, and schema drafts without uploading content by default.

Encode Unicode text as UTF-8 Base64 or decode standard Base64 to text locally. Compare examples, switch modes and copy the result.

Base64 represents bytes as text; it is not encryption. This tool encodes text using UTF-8 and decodes standard Base64 bytes using UTF-8. Anyone with the encoded value can decode it.

Translate Unix timestamps, ISO strings, and local dates.

Designed for event timestamps, date inputs, time zone checks, and product copy that needs precise dates.

Create Discord timestamp codes in all nine documented styles with local previews.

Plan timezone-friendly events, reverse existing codes, and copy ready-to-send messages without a Discord bot or login.

Encode query strings and decode URL-safe text.

A simple definition for request debugging, redirect checks, campaign links, and API query parameter cleanup.

Switch text between title case, sentence case, slug case, and constant case.

Useful for headings, filenames, labels, docs, content snippets, and structured naming tasks.

Convert HEX, RGB, HSL, and accessible color references.

A design-facing definition for quick palette checks, UI handoff cleanup, and contrast-aware color work.

Compress and resize JPEG, PNG, and WebP images locally in the browser with preview, savings, and download.

This image compressor resizes and re-encodes JPEG, PNG, and WebP files inside your browser. You can choose output dimensions, quality, and format, preview the result, compare original and output size, and download the compressed image without uploading it.

Generate a Markdown table of contents from headings locally in your browser.

Use it for README files, documentation pages, and wiki content to auto-build anchor-linked TOCs without uploading text.

Trim lines, remove blank lines, and deduplicate text locally.

Useful for cleaning pasted content, spreadsheet exports, log snippets, and text with stray whitespace or duplicate lines.

Add a prefix or suffix to every line without uploading content.

Handy for adding bullet points, quote characters, comment markers, list numbers, or custom delimiters to multi-line text.

Sort multiline text alphabetically, numerically, or by line length.

Quickly order lists, glossaries, word sets, or CSV rows without leaving the browser or copying to a spreadsheet.

Count Unicode code points, whitespace, punctuation, lines and paragraphs locally, with a simple ASCII and CJK word-count rule.

Paste text to see counts immediately. Characters count Unicode code points, while words count ASCII letter/digit/underscore runs and individual characters in U+3400–U+9FFF. This is not language-aware word segmentation.

Convert full-width and half-width ASCII characters locally.

Essential for CJK text processing, form data normalisation, and fixing mixed-width punctuation in multilingual content.

Escape non-ASCII text to Unicode \uXXXX sequences or decode fixed-width and braced Unicode escapes locally. Emoji use UTF-16 surrogate pairs.

Encode leaves ASCII unchanged by default and converts non-ASCII characters to \uXXXX escapes. Emoji above U+FFFF use two UTF-16 escapes. Decode accepts both \uXXXX and \u{1F600}.

Escape and unescape JSON string content for curl, config, and logs.

Useful for embedding multiline strings in JSON config files, curl -d payloads, log entries, and debugging serialised data.

Encode five HTML special characters, or decode six common named entities and decimal or hexadecimal character references, locally in your browser.

Encode converts &, <, >, double quotes and apostrophes to entities. Decode recognizes amp, lt, gt, quot, apos and nbsp, plus decimal and lowercase #x hexadecimal references ending in a semicolon.

Convert query strings to JSON and JSON objects back to query strings.

Handy for API debugging, link sharing, form payload inspection, and converting GET parameters to structured data.

Compress multi-line SQL into a single line and strip comments locally.

Remove SQL comments and optionally collapse whitespace in the browser. The scanner recognises single, double and backtick quotes while finding comments; it is not a dialect parser, validator or query optimizer. Review the output before executing it.

Convert text to hexadecimal and decode hex back to UTF-8 text locally.

Use it to inspect byte values, decode hex dumps, build hex literals for code, and debug encoding issues without uploads.

Convert images to PNG, JPEG, or WebP locally in your browser. No uploads.

Convert one browser-readable image to PNG, JPEG or WebP without changing its pixel dimensions. Choose JPEG or WebP quality, compare file sizes, then download the result. JPEG replaces transparent areas with white; PNG and WebP can retain transparency.

Resize one or many images by fixed size or percentage locally.

Useful for thumbnails, avatars, and bulk downscaling with optional aspect-ratio lock and per-image download.

Crop images to square, 16:9, 4:3, or a free ratio locally.

Handy for social headers, profile pictures, and framing with adjustable horizontal and vertical offset.

Rotate by 90-degree steps and mirror images horizontally or vertically.

Use it to fix orientation, mirror scans, and re-export rotated photos without uploading the file.

Strip EXIF, GPS, and camera metadata by re-encoding images locally.

Useful before sharing photos publicly to remove location and device data with a clean PNG or JPEG re-export.

Convert images to Base64 data URLs and render data URLs back to images.

Handy for inlining icons in CSS or HTML, email assets, and quick previews of pasted data URLs.

Create static QR codes for websites, text, email, phone, and SMS locally.

Use live encoding metrics, scanability warnings, logo controls, and PNG or SVG export for screen and print workflows.

Create a Wi-Fi QR code and printable guest card without uploading credentials.

Supports WPA, WPA2, WPA3 Personal, WEP, open and hidden networks with escaped payloads, password masking, and device-testing guidance.

Convert subtitles between SubRip SRT and WebVTT formats locally.

Useful for HTML5 video captions, player compatibility, and migrating subtitle files without uploads.

Adjust subtitle timestamps by a positive or negative millisecond offset in your browser. Paste text with hour-based SRT or VTT timestamps, review and copy.

Use a fixed offset when all captions are early or late by the same amount. Positive milliseconds delay captions; negative milliseconds advance them. This tool changes matching timestamps in pasted text.

Merge two SRT tracks into one bilingual subtitle file locally.

Combine a primary and secondary language line per cue for language learning and dual captions.

Decode JWT header and payload and inspect exp, iat, and nbf locally.

Use it for auth debugging and token inspection with human-readable timestamps; no secret or upload needed.

Compute MD5, SHA-1, SHA-256, and SHA-512 hashes locally in the browser.

Useful for checksums, integrity checks, and fingerprinting text with Web Crypto and no upload.

Generate UUID v4 and time-ordered UUID v7 values locally.

Use it for database keys, request IDs, and seed data with bulk generation and copy.

Generate strong random passwords with a secure browser RNG locally.

Tune length and character classes, exclude ambiguous characters, and see a strength estimate.

Test regular expressions with live matches, groups, and a replace preview.

Useful for crafting patterns, inspecting capture groups, and previewing substitutions locally.

Convert between JSON and YAML with adjustable indentation locally.

Handy for config files, CI pipelines, and Kubernetes manifests with two-way conversion and no upload.

Convert JSON arrays to CSV and CSV back to JSON locally.

Useful for spreadsheets, data exports, and flattening nested objects with selectable delimiters.

Compare two JSON documents and list added, removed, and changed keys.

Use it for API response diffs, config reviews, and snapshot comparisons with a path-based summary.

Convert Markdown to HTML and HTML back to Markdown locally.

Handy for docs, README files, CMS content, and email with a live preview and clean round-trip.

Merge multiple PDF files locally with drag-and-drop ordering.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Split a PDF into page ranges locally in your browser and download the extracted results as a ZIP.

PDF Splitter extracts selected page ranges from a PDF in your browser and downloads the results as a ZIP. Enter single pages or ranges such as 1-3,5, process locally, and keep the original document on your device by default.

Rotate selected or all PDF pages locally before export.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Select PDF pages to remove and download a cleaned copy.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Drag page cards into the right PDF page order.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Add page numbers with position, prefix, and size controls.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Apply a text watermark with opacity and angle controls.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Combine images into a PDF locally with page size and margin controls.

Combine images into one PDF with one image per page. Reorder the list, select portrait A4, portrait Letter or Fit image, and set margins in PDF points. Each image is centered at its original aspect ratio and scaled down only when necessary; this tool does not perform OCR.

Convert Word DOCX content to editable Markdown locally.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Turn pasted or uploaded CSV into a Markdown table.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Edit a table grid and copy Markdown table syntax.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Generate a project README from structured prompts locally in your browser.

Build a Markdown README from the fields you provide: project name, description, features, installation command, usage command and license. The preview updates as you type and can be copied into README.md. This is a local template form, not AI repository analysis.

Generate barcodes and download SVG or PNG assets.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Pick HEX and RGB colors from an uploaded image.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Design linear CSS gradients and copy the CSS rule.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Validate JSON syntax and copy pretty-printed output.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Run JSONPath expressions against JSON locally.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Format or minify XML without uploading data.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Preview upcoming run times for a cron expression.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Format SQL by database dialect in the browser.

Built as a free browser-local AppHelp utility with copy or download output and no account requirement.

Convert Markdown into a Word-compatible DOCX document locally in your browser.

Browser-local markdown to docx converter with copy or download output and no account requirement.

Generate a clean resume with template styles, then export Markdown, HTML, DOCX, or print to PDF locally.

Build a resume from contact details, a summary, comma-separated skills, experience, and education. Modern, Classic, and Compact styles change the HTML preview and print layout. Copy Markdown, download Markdown or DOCX for editing, or export HTML and print it to PDF.

Render SVG to an exact-size PNG with aspect lock, fit, padding, transparency, and safe local preview.

Browser-local SVG rasterizer with source inspection, 1x–4x presets, exact dimensions, contain or cover placement, transparent or solid background, safety warnings, clipboard copy, and PNG download.

Render Markdown into a polished, downloadable image with themes, fonts, and backgrounds.

Browser-local markdown to image generator with curated themes, syntax highlighting, and PNG or JPEG export.

Optimize SVG code locally with SVGO, visual before-and-after preview, gzip size comparison, precision controls, safe preview, and downloadable output.

Paste SVG markup or open an .svg file, choose number precision and cleanup options, then compare the original and SVGO-optimized image, raw bytes, and gzip size. AppHelp preserves viewBox, warns about IDs and external content, and lets you copy or download the result without uploading the asset.

Convert SVG into reusable React JSX or TypeScript components with configurable props locally.

Browser-local SVG to React converter with JSX attribute cleanup, TypeScript SVG props, currentColor, responsive sizing, title and description, memo, forwarded ref, safe preview, copy, and download.

Generate PNG favicon sizes, favicon.ico, and manifest JSON from one source image.

Browser-local favicon generator with padding controls, size previews, ICO output, PWA icons, and no upload requirement.

Add text watermarks to images with position, opacity, and size controls locally.

Browser-local image watermark tool with copy or download output and no account requirement.

Choose a seed color, generate five related swatches, and copy HEX values or CSS custom properties.

Analogous, complementary, and triadic modes · Five generated HEX swatches

Resize an image with five social presets, center cropping or background padding, and a local PNG download.

Five fixed canvas sizes · Center crop or preserve the whole image

Center-crop an image to a square and download nine PNG tiles in a ZIP, named by row and column.

Center square crop with 3 × 3 preview · Adjust the full square output size

Infer a JSON Schema from sample JSON data locally in your browser.

Browser-local json schema generator with copy or download output and no account requirement.

Convert XML documents into JSON locally without uploading data.

Browser-local xml to json converter with copy or download output and no account requirement.

Generate HMAC signatures for API debugging with browser crypto locally.

Browser-local hmac generator with copy or download output and no account requirement.

Convert a cURL command to fetch code with URL, method, headers, and body. Conversion stays local and sends no request.

Read -X/--request and -H/--header · Convert -d/--data/--data-raw/--data-binary

Convert a cURL command to Axios code with URL, method, headers, and data. Conversion stays local and sends no request.

Read -X/--request and -H/--header · Convert -d/--data/--data-raw/--data-binary

Convert cURL into robust Python Requests code for JSON, forms, auth, uploads, cookies, and timeouts.

Paste a command, choose Requests or Session output, mask secrets, and copy or download the result — all locally.

Build reusable HTTP header blocks and code snippets locally.

Browser-local http headers generator with copy or download output and no account requirement.

Parse browser, OS, device, and engine hints from User-Agent strings locally.

Browser-local user agent parser with copy or download output and no account requirement.

Format and minify GraphQL queries, mutations, and fragments locally.

Browser-local graphql formatter with copy or download output and no account requirement.

Generate responsive CSS clamp() expressions for typography and spacing.

Browser-local css clamp generator with copy or download output and no account requirement.

Build, batch-generate, and inspect UTM links with classic and advanced GA4 campaign fields.

Preserve existing queries and fragments, apply naming presets, inspect links, and export up to 100 URLs as CSV locally.

Generate TypeScript interfaces or type aliases instantly from JSON objects and arrays.

Infer nested types, arrays, unions, nullable and optional fields, then copy or download the result without uploading JSON.

Compare text and code in split or unified views with line, word, and character highlights.

Load local text files, tune ignore rules, inspect line-numbered changes, and copy or download a unified .diff patch without uploads.

Convert iPhone HEIC/HEIF photos to JPG or PNG in batch with no upload.

Browser-local HEIC decoder with batch conversion, JPG quality, PNG output, previews and ZIP download.

View, merge and convert GPX, KML, GeoJSON and CSV coordinates on a map.

Browser-local map file viewer on OpenStreetMap with KML/GPX/GeoJSON conversion, GPX merge, track joining, CSV to KML and distance stats.

Make passport, visa and ID photos with background replacement and print sheets, no upload.

Browser-local passport photo maker with 16 country presets, head guides, in-browser background replacement, file-size targets and 4×6/A4 print sheets.

Print 2 or 4 invoice PDFs per A4 page with cut lines, locally.

Browser-local invoice sheet builder with 1/2/4-up layout, auto rotation, margins, cut lines, reorder and preview.

Sign PDFs, add stamps or text marks and flatten them, no upload.

Browser-local PDF signing with a signature pad, stamp images with white removal, multilingual text marks, drag placement and flatten-to-image.