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53 free AI and developer tools — no signup required.
Check if text was written by AI with a sentence-by-sentence heatmap.
Turn any YouTube video into clear notes with chapters, quotes, chat, and flashcards.
PDF summarizer with page citations, multi-doc compare, and domain templates.
Paraphrase in 10 modes with diff view, freeze words, and brand voice training.
Free math solver with step-by-step solutions, photo upload, and 4 learning modes.
Grammar checker with multi-tone preview, style guides, and 30+ languages.
10+ ranked subject lines with open-rate scoring and paired preheaders.
15+ scored titles across 10 formats with paired meta descriptions and SERP previews.
Cold email plus 3-step follow-up sequence with spam-filter cleanup and 6 campaign types.
Format or generate LinkedIn posts with live preview, hook generator, and carousel splitting.
STAR-method bullets with 200+ action verbs, JD tailoring, and ATS-safe output.
Summarize any URL in 10 seconds with permalinks, OCR, and 30+ languages.
Real-time counter with reading time, keyword density, and platform presets.
Translate 5,000 chars across 30+ languages with dialect-aware AI and tone control.
5 captions across 10 vibes with tiered hashtag stacks and post-type awareness.
Explain code line-by-line with persona modes, hallucination flagging, and security scanning.
Whisper-powered audio/video to text. 5 export formats, 100+ languages.
Format, validate, tree-view, schema-gen, type-gen, diff. 100% browser-side.
3 variants side by side, image preview, hex dump fallback.
Live regex tester with multi-flavor compare and click-to-insert cheatsheet.
Create beautiful CSS gradients with a visual editor.
Decode + sign + verify HS256/384/512 in browser.
5 dialects, auto-detect, 3 keyword-case modes, browser-only.
20+ QR types with styling, logo, scanner, batch CSV, and scannability score.
7 harmonies, WCAG audit, image extract, 6 export formats.
8-platform preview, pixel-accurate truncation, URL auto-fill, 4 output formats.
15 schema types, three formats (JSON-LD / Microdata / RDFa), built-in Rich Results validator.
Pixel-accurate desktop + mobile preview with length analysis.
1/2/3-grams + stop-word filter + page compare.
15 bots, AI crawler blocking, built-in path tester.
Image + hreflang + sitemap-index, per-URL control, browser-only.
Multi-encoder side-by-side, visual diff slider, batch zip, no 20/mo cap.
6 snippet formats, batch upload, size warnings, browser-only.
10 PNG sizes + ICO + manifest + HTML snippet, all in one ZIP.
Custom DPI, 7 resolution presets, batch + ZIP, PNG/JPG/WebP.
37 presets, 4 modes, batch ZIP export, browser-only.
8 gradients, 3 frames, full controls, browser-only.
13 currencies, logo, accent color, native PDF export.
9 countries, 5 frequencies, COL compare, browser-only.
Real PITI, 3-scenario compare, extra-payment what-if, year-by-year chart.
ROI + IRR + payback + sensitivity. 6 investment types.
3 scenarios side by side, inflation-adjusted, milestone chart.
5 modes, break-even, bulk CSV, 10 industry benchmarks.
8 jurisdictions, marginal + effective, bracket breakdown.
CSV import, FIFO/LIFO/HIFO compare, Form 8949, US/UK/CA/AU. No SaaS fee.
Generate ERC-20/BEP-20 token smart contract code.
15 chains, auto-detect, subtype identification, burn warnings.
ERC-721 + ERC-1155, traits builder, CSV bulk, IPFS-ready.
APR/APY + IL simulator + HODL vs LP compare, browser-only.
ERC-20/721/1155 + OZ v5 + 9 extensions + gas estimates.