Benchline

Benchline

Benchline is a free directory of browser tools for the small, exact jobs around shipping software: JSON, PDFs, images, tokens, headers, and the files a crawler can cite. Each tool is a pure function with a page on the site and the same function on a stateless MCP server. Tool inputs stay on the device unless a tool's job is to read a public URL. When Postgres is configured, the site can store anonymous usage counts; see Privacy.

Live: https://benchline.fabwaseem.com

Screenshots

The directory is the home page. The JSON formatter is one tool page (/t/json-formatter).

Features

• A searchable directory, with categories, tags, and a command palette on ⌘K. Filtering runs in the browser.
• One folder per tool: metadata, a client page, and pure lib/ covered by vitest.
• A stateless Streamable HTTP MCP server at /mcp. No API key and no session.
• The same functions over HTTP at POST /api/v1/tools/ , with an OpenAPI document at /openapi.json.
• /llms.txt and /llms-full.txt, generated from the registry.
• Light and dark themes. Corner radii stay on the small token scale.

Tools

Every tool, in toolOrder. Run pnpm gen:readme-tools after adding one.

Developer

Build files, schedules, and the small programs a deploy depends on.

Cron. Build a cron expression and read the next runs.

• Cron expression builder — Build or paste a cron schedule, read it in plain English, and see the next run times.

Next.js. Production files for shipping a Next.js app in a container.

• Next.js Dockerfile generator — Generate a production multi-stage Dockerfile for Next.js, plus .dockerignore and compose.

Fixtures. Placeholder copy and seeded rows for a schema.

• Lorem ipsum — Placeholder copy, or fake rows as JSON, CSV, and SQL, from a seed.

Regex. Test a JavaScript regular expression against a sample.

• Regex tester — Test a JavaScript pattern, read the groups, and preview a replacement.

Code. Minify and convert source code.

• Code Minifier — Minify JavaScript, CSS, and HTML with byte-level savings.

Data & Formats

JSON, tables, and the encodings that move data between systems.

JSON. Format JSON and convert it to YAML.

• JSON formatter — Pretty-print, minify, and validate JSON, with the exact line and column when it fails.
• JSON YAML converter — Convert JSON, YAML, TOML, and XML in the browser, and keep the line number when a document fails.
• JSON Schema — Infer a schema from JSON, validate against one, and export TypeScript and Zod.
• JSONPath tester — Query JSON with JSONPath Plus and inspect every match.
• JSON to Types — Paste JSON, get TypeScript, Zod, Pydantic, dataclass, and Go types.

Tables. Turn CSV into JSON and JSON into rows.

• CSV JSON converter — Convert CSV to JSON and JSON back to CSV, with a delimiter and a header row you choose.

Encoding. Base64 and the bytes a string is hiding.

• Base64 codec — Encode and decode Base64 for text or a file, including the URL-safe alphabet.
• Programmer calculator — Base conversions, bitwise ops, and a clickable bit grid.
• ZIP Tools — Create ZIP archives and extract them, entirely in your browser.

Markup. Markdown and HTML, converted in either direction.

• Markdown HTML — Convert Markdown to HTML, or HTML back to Markdown, with a live preview.

SQL. Format a query without running it.

• SQL formatter — Format SQL for PostgreSQL, MySQL, BigQuery, Snowflake, and other dialects.

SEO & AI Search

Markup, crawlers, and the files an AI search engine can cite.

AI search. Files and checks that decide what an AI crawler can fetch, cite, and skip.

• llms.txt generator — Read a public sitemap and write an llms.txt index, plus an optional llms-full.txt.
• AI SEO checker — Score crawler access, llms.txt, structured data, and the on-page signals AI search uses.
• robots.txt checker — Read allow and disallow rules, sitemap links, and the mistakes that make a robots.txt file lie.
• Page to Markdown — Fetch a public page and turn the article into Markdown.

SEO. Structured data and the markup a crawler can quote without guessing.

• JSON-LD schema generator — Fill a form, get valid schema.org JSON-LD for Article, FAQ, Product, Organization, and more.
• Sitemap validator — Check a sitemap URL or XML, or generate a urlset from a list.

AI dev. Token counts and the cost of a prompt before you send it.

• AI token counter — Count tokens and estimate the API cost of a prompt for GPT, Claude, and Gemini models.

Social previews. Open Graph cards, meta tags, and the picture a shared link unfurls into.

• OG image generator — Pick a template, watch the card update, then download the PNG or copy the Next.js file.
• OG template list — Browse Open Graph template ids, fields, and color presets.
• Meta tags inspector — Read title, description, canonical, robots, Open Graph, Twitter, and JSON-LD types from one public URL.
• Social Image Resizer — Fit any photo to the exact dimensions for Instagram, YouTube, X, LinkedIn, and Facebook — cropped to the subject you pick.
• Meme Generator — Classic top/bottom caption memes from styles or your own images.

Image & Media

Convert, compress, and resize pictures in the browser. The file stays on the device.

Image. Convert, compress, and resize pictures in the browser. The file stays on the device.

• Image format converter — Convert HEIC, WebP, PNG, JPG, and AVIF in the browser. Nothing is uploaded.
• Image compressor — Shrink JPEG, PNG, WebP, and AVIF in the browser, with the real before and after size.
• Image resizer — Resize by pixels or percent, with the aspect ratio locked and a batch ZIP.
• QR and barcode reader — Read QR codes and barcodes from a photo, a paste, or the camera.
• SVG optimizer — Minify an SVG, compare the size, and keep the viewBox unless you turn that off.
• EXIF viewer and remover — Read photo metadata, including GPS, and strip all of it or only the location.
• Image cropper — Crop with a free box or an aspect preset, including a circle.
• Image to text — Read the words in a picture. The OCR model downloads once and runs in this browser.
• Background remover — Cut out a portrait in the browser, or clear a solid backdrop without a download.
• Photo Collage — Arrange photos into grid layouts and export high-res PNGs.

Audio. Trim and shape sound in the browser. The file stays on the device.

• Audio Trimmer — Cut a section out of an audio file. See the waveform, drag the trim region, add fades, and export WAV.

PDF & Documents

Merge, split, compress, and build PDFs in the browser. The files stay on this device.

• Merge PDF — Combine PDFs in the browser. Reorder them, keep a page range from each file, and download one document.
• Split PDF — Extract a page range, or split a PDF into single pages or chunks, then download a PDF or a ZIP.
• Compress PDF — Shrink a PDF in the browser. Pick a preset or a target size and compare the file before and after.
• Image to PDF — Turn JPG, PNG, and WebP images into one PDF. Set the page size, orientation, margin, and order.
• PDF to Text — Read the selectable text of a PDF, with a markdown heading when the type is larger.
• Rotate PDF — Reorder, rotate, or drop pages, then download the PDF.
• PDF to Image — Render PDF pages to PNG or JPEG, then download one image or a ZIP.
• Protect PDF — Add an AES password, or unlock a PDF when you already know the password.
• Resume Builder — Build a polished resume in the browser: profile, experience, education, and skills, exported as a clean PDF.
• PDF Signature — Sign a PDF in the browser. Draw or type your signature, place it on any page, and download the signed file.
• PDF Form Filler — Fill interactive PDF forms in the browser and export.

Security & Crypto

Tokens, hashes, passwords, and the bi