Tools I built,
free for everyone.
43 small, fast developer tools for data, documents, APIs, and DevOps — most run entirely in your browser. No installs, no accounts, no tracking.
Data & Query
8Query, transform, and profile data files with real SQL.
CSV & JSONL Processor
Stream-process CSV, TSV, NDJSON, and JSONL with Miller-style verb chains.
CSV · JSONL
Open →CSV JSON Data Transformer
Filter, sort, pivot, and reshape CSV, JSON, TSV, and NDJSON data.
CSV · JSON
Open →CSV SQL Query Editor
Run SQL SELECT queries on CSV and TSV files instantly in your browser.
CSV · SQL
Open →Dataset Profiler
Profile CSV, Parquet, JSONL, Avro, and SQLite datasets and infer schema.
Data · Profiling
Open →DuckDB File SQL
Run DuckDB SQL on CSV, JSON, Parquet, and SQLite files in the browser.
DuckDB · SQL
Open →Nested Archive Inspector
Open and safely extract ZIP, 7z, RAR, TAR, ISO, DMG, and nested archives.
Archives · Security
Open →Postgres Migration Safety Checker
Preflight unsafe PostgreSQL migrations for locks and blocking DDL.
Postgres · SQL
Open →SQL Formatter & Linter
Lint, format, and rewrite SQL across Postgres, MySQL, Snowflake, and BigQuery.
SQL · Format
Open →Documents & PDF
13Convert, compare, fill, and process documents.
AsciiDoc Online Converter
Compile AsciiDoc to HTML, PDF, and EPUB with diagrams and themes.
AsciiDoc · Convert
Open →DOCX Redline & Compare
Compare DOCX versions, accept or reject tracked changes, extract comments.
Word · Diff
Open →EPUB Validator & Repair
Validate, repair, and convert EPUB, MOBI, and AZW3 ebooks.
EPUB · Ebooks
Open →Excel Workbook Diff
Compare Excel workbooks at cell, formula, style, and structure level.
Excel · Diff
Open →JSON to Excel Generator
Generate styled Excel XLSX spreadsheets from declarative JSON.
Excel · JSON
Open →LaTeX Math Renderer
Render LaTeX math to SVG, PNG, PDF, and accessible MathML.
LaTeX · Math
Open →Pandoc Document Converter
Convert Markdown, DOCX, HTML, LaTeX, EPUB, and PDF with Pandoc.
Pandoc · Convert
Open →PDF Form Filler
Fill, flatten, and validate PDF AcroForms from JSON, FDF, or XFDF.
PDF · Forms
Open →PDF to RAG Chunks
Parse PDFs into RAG-ready Markdown and JSONL chunks with reading order.
PDF · RAG
Open →PDF Toolkit
Merge, split, compress, rotate, and watermark PDFs entirely in your browser.
PDF · Edit
Open →PDF Visual Diff
Compare PDFs visually and structurally with per-page masks and summaries.
PDF · Diff
Open →PPTX to PNG Converter
Render PowerPoint slides to PNG, JPEG, SVG, and PDF and extract notes.
PowerPoint · Convert
Open →Typst Online Compiler
Compile Typst documents to PDF, SVG, PNG, and HTML in a live editor.
Typst · PDF
Open →APIs & Schemas
3Diff specs and catch breaking changes before they ship.
GraphQL Schema Diff
Diff two GraphQL schemas to find breaking and dangerous changes.
GraphQL · API
Open →OpenAPI & JSON Schema Diff
Compare OpenAPI and JSON Schema specs to find breaking changes per operation.
OpenAPI · API
Open →OpenAPI Breaking Change Checker
Detect breaking changes between OpenAPI 3.0 and 3.1 specs.
OpenAPI · API
Open →Config & Formats
4Query and convert structured config and markup.
CLI Output to JSON
Paste raw CLI output and get clean, structured JSON for 100+ commands.
CLI · JSON
Open →HTML CSS Selector Extractor
Query and scrape HTML with CSS selectors, extract text and attributes.
HTML · Scraping
Open →YAML & JSON Patcher
Query and patch YAML, JSON, TOML, and XML configs while preserving comments.
YAML · JSON
Open →YAML & JSON Query Editor
Query and convert YAML, JSON, XML, TOML, and INI with jq-style expressions.
YAML · JSON
Open →Media & Design
7Work with images, video, audio, fonts, and SVG.
Audio Loudness Normalizer
Run EBU R128 loudness normalization and generate waveforms.
Audio · FFmpeg
Open →Font Subsetter & Converter
Subset, convert, and QA TTF, OTF, WOFF, and WOFF2 fonts in the browser.
Fonts · WOFF
Open →Image Metadata Stripper
Remove EXIF, GPS, XMP, and IPTC metadata from images and documents.
Images · Privacy
Open →Open Graph Image Generator
Generate Open Graph social cards and syntax-highlighted code screenshots.
Open Graph · Images
Open →Subtitle Converter
Convert, normalize, mux, and burn SRT, VTT, ASS, and TTML subtitles.
Subtitles · Video
Open →SVG Optimizer & Sanitizer
Sanitize, optimize, rasterize, and diff SVGs and strip XSS risks.
SVG · Optimize
Open →Video Thumbnail & FFmpeg Tool
Trim, concat, and remux video and generate thumbnails with FFmpeg.
Video · FFmpeg
Open →Logs & Text
3Parse, query, and make sense of log files.
Grok Pattern Playground
Write, test, and benchmark grok and Logstash patterns with field inference.
Logs · Regex
Open →Log File SQL Analyzer
Query any log file with SQL — nginx, Apache, syslog, and JSON logs.
Logs · SQL
Open →Log Syntax Highlighter
Paste any log file and get instant syntax highlighting and structure.
Logs · Viewer
Open →DevOps & Infra
3Harden manifests, plans, and CI pipelines.
GitHub Actions Security Linter
Lint and security-scan GitHub Actions YAML for unpinned actions and injection.
CI/CD · Security
Open →Kubernetes Manifest Analyzer
Get a production-readiness score for Kubernetes YAML manifests.
Kubernetes · DevOps
Open →Terraform Plan Visualizer
Visualize terraform plan JSON with dependency graphs and blast-radius warnings.
Terraform · DevOps
Open →Security & Files
2Inspect files, archives, and certificates safely.
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