345 free online tools
Find a tool by task, format, or name. Check its example and limits before working with PDFs, images, text, or data in your browser.
Explore tools
JSON samples to schema skeleton
Merge strict JSON sample shapes into an editable Draft 2020-12 type skeleton with sources and inference evidence.
GraphQL document validator
Check a whole GraphQL document against local SDL or introspection JSON and download complete static diagnostics with exact originals.
Preview ICU MessageFormat1
Render nested ICU select and plural messages locally, and locate invisible syntax characters with original source positions.
TOML and JSON configuration converter
Convert one configuration between TOML and JSON, retaining empty objects, arrays of tables and numeric types, with the original and report.
Tryptic peptide positions
Enumerate every theoretical peptide occurrence from one protein sequence or FASTA, up to a chosen missed-cleavage depth, with positions, CSV and exact source bytes.
File signature type hints
Check common signatures, filename relations and explicit unknown results from bounded local file samples; download the complete evidence JSON.
XCstrings manual translation exchange
Export existing direct translations and states for collaborators, then apply a complete returned table or a SHA-bound partial patch while retaining untouched catalog bytes.
Preview bound SQL parameters
Expand typed T-SQL parameter values for diagnosis and audit every binding.
Validate a JSON instance against a schema
Check supplied Draft 2020-12 constraints, inspect every supported rule failure and save the complete validation report.
Query local JSON with JSONPath
Filter nested JSON with a fixed RFC 9535 profile and export complete matched values with original locations.
Merge three versions of a text file
Combine local and remote edits against a common ancestor, inspect conflicts and save the complete chosen text.
BED overlap count matrix
Count each sample interval that overlaps each reference span, including duplicate and nested records. Keep every reference field, the chosen sample order, exact originals and a complete source report.
Correct photo capture clocks
Apply one explicit clock correction to existing JPEG Exif dates; keep every other source byte and download the full change report.
Explain declared route selection
Compare a declared IPv4/IPv6 route table against destinations; retain longest-prefix and metric decisions, equal-rank candidates, terminal actions and every comparison.
Inspect PostgreSQL 16 JSON plans
Read one or two PostgreSQL 16 JSON plans, retain full trees, Workers and numeric spelling, explain loops and parallel scope, and compare matching positions.
DNA sequence logo
Generate a quantitative ACGT logo from an existing alignment, with explicit probability or information heights, gap handling, full column measurements and exact source bytes.
Processed ABIF trace region
Export every processed ACGT trace sample in a selected ABIF region, with stored basecall anchors, all qualities, complete SVG pages and exact source bytes.
CSV ↔ vCard contact migration
Map contact columns locally, preserve repeated fields and structured values, and export editable CSV or UTF-8 vCard 3.0 with a complete sidecar.
BibTeX and RIS citation migration
Convert local article, book and conference-paper references with ordered authors, complete source records and a field mapping report.
Count rainflow cycles with original source indices
Count every cycle from a complete local CSV, preserve original sample/time positions and export the full range–mean matrix.
Psychrometric series chart
Turn a complete temperature/RH series into rowwise moist-air properties and an all-point chart, preserving original and invalid rows.
Column correlation matrix
Compute Pearson or Spearman correlations from a complete CSV, preserving original labels, repeated selections, each pair’s effective N and status.
Contingency table inference
Calculate a chi-square independence test directly from aggregate counts, with complete expected cells, contributions and residuals.
Boolean logic minimizer
Minimize DNF, CNF or both under an explicit dont-care set, verify every care row, and keep the full truth table, variable mapping, costs and gate SVGs.